Ultra FreeArc Optimizer 1.05 (c) 2021-2026 supercompression.org
FreeArc 2014 (c) Bulat.Ziganshin@gmail.com
https://en.wikipedia.org/wiki/FreeArc

Use it carefully! Please create backup copy before use it.
Please verify content of each archive.
Run only 1 active instance of the program!

How does it work?
Ultra FreeArc Optimizer repacks your archives using all possible compression algorithms, trying (sorting) different algorithms for each file type (there is a selection by file extension). At the end, it creates the smallest possible archive size (i.e. it optimizes the original archive, the content does not change!). This is why it is quite a long process (several times longer than simply creating an archive), but it will not affect the speed of unpacking the archive, it will still be very fast (unlike other superarchivers like PAQ, where you have to wait for hours to unpack, here it takes only a few seconds or even less). The compression gain can be up to 10-20% for certain types of files! If the optimized archive is the same size as the original one or larger, the program will leave the original archive unchanged, i.e. you will not lose anything in size in any case.

Thus, the program can also be used as a regular Converter from various types of archives (7z, zip, rar, etc.) to ARC archives.

Download Ultra FreeArc Optimizer 1.05 (33 Mb):
Download here (33 mb)
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For daily use, I recommend the “Good” mode, it is fast enough and gives good results. For better compression, use the “Best” or “Ultra” modes. The “Extreme” and “Extreme2” modes can be selected if the archive size is small enough (up to 10-50 MB), or if you want to get maximum compression despite a fairly long repacking process. If you have more than 4 GB of RAM, you can increase the size of the LZMA dictionary to 256 MB and PPMD to 1024 MB, which can further improve compression. Also, a small improvement usually gives an increase of the parameter “LZMA word Size” to 273.

Features:
– Auto switch LZMA/PPMD/GRZIP/EXE/DISPACK/DELTA/DICT/LZP/REP/TTA during creation ARC-archives (+ improved (tuned) lzma for jpg, bmp, wav, exe…)
– Full compatible with original ARC format.
– High compression ratio – better than non tuned FreeArc original.
– Supported formats: ARC, 7z, ZIP, ZIPX, CAB, RAR, ARJ, LZH, GZIP, BZIP2, Z, CHM, ISO, NSIS, TAR, CPIO, RPM and DEB (formats supported by 7-zip/FreeArc).
– External compressors: PRECOMP, SREP, ZPAQ, LPAQ8, FP8, PAQ8PX, MCM, Kanzi, Razor, Durilca, Nanozip.

You can download original FreeArc installer or portable (zip). Also you can use Peazip Archiver for compress/extract ARC files.

FreeArc is an archiver featuring:
* best speed and compression ratio among all practical archivers
* dedicated algorithms for multimedia, executable and text compression
* compression dictionaries up to 2gb
* solid archives with smart updating
* AES+Twofish+Serpent encryption
* recovery record
* self-extracting archives
* extraction of zip, rar, 7z, gz, bz2, cab and many other archive formats
* integration with Explorer, Total Commander, FAR manager and InnoSetup
* GUI and console versions both for Windows and Linux
* free for commercial and non-commercial use

Program optimizes your file to new one with «_optimized» name ending (source file will remain intact).

Current archive has its own status in the list: «running», «done» and «saved space».
Full stats:
1. Number of optimized files (total and current session).
2. Files in the queue (quantity).
3. Saved disk space (Mb) total and for each archive in the list.

It’ free for commercial and non-commercial use!
If you like my program and you want help improve it, you can help me (donate) here.
Contact me at maxcompress@ya.ru

History:
2026-01-18
Ultra FreeArc Optimizer 1.05
– improved compression:
— added multi-threaded Durilca+4×4 (faster);
— added multi-threaded FP8+4×4 (faster);
— added multi-threaded PAQ8PX+4×4 (faster);
— added 4/6-threaded PPMD+4×4 for large files (faster);
— added LZMA:ht4:1gb (better for large files);
— improved compression for some files (internal methods);
– added fastest methods with deduplication: rep/srep+LZ4, rep/srep+Tor:3, m4;
– added option “Use current direcory instead of system TEMP”;
– added option “Hide banner”;
– update 7-zip 25.01, Kanzi 2.4, FP8v6;
– internal optimizations.

2025-03-16 – v.1.04
– improved compression (added external compressors: MCM 0.85, Durilca 0.5, Nanozip 0.09a)
– improved compression for some files (internal methods)
– added 2-threaded PPMD+4×4 for large files (faster)
– update 7-zip 24.09
– internal optimizations

2024-10-23 – v.1.03
– improved compression for some files (internal methods);
– fixed size limit for paq8px (for EXE-files).

2024-07-07 – v.1.02
– added external compressors: PRECOMP, SREP, ZPAQ, LPAQ8, FP8, PAQ8PX, MCM, Kanzi, Razor;
– improved compression for some files;
– added compression/extraction for files and folders.

2021-12-12 – v.1.01 – first release.

Download Ultra FreeArc Optimizer 1.05 (33 Mb):
Download here (33 mb)
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Features:
– High compression ratio.
– Optimizer for JXL (10-15% smaller)(Lossless).
– Supported formats: jpg, jpeg, jpe, webp, png, jxl, tiff, tif, gif, bmp, pnm, avif, heif, heic, flif, ppm, apng, pfm, pgx.
– Option for lossy compression.
– Option for lossless compression.
– You can set «Run in background (without console output)» or uncheck it for manual process control.

Compression:
– Lossy: about 60% smaller than JPEG for same visual quality.
– Lossless JPEG transcoding: about 20% smaller.
– Lossless: about 35% smaller than PNG (50% smaller for HDR).

Features:
– High-fidelity lossy image compression.
– Best lossless image compression.
– Progressive decoding.
– Lossless JPEG transcoding.
– Designed for both photographic and synthetic images.
– Fast software encoding and decoding.
– Full support for wide gamut and HDR.
– Perceptually optimizing reference encoder.
– FOSS and royalty-free.

Download Ultra7z Images/Photos to JPEG XL (jxl) Converter/Optimizer 1.05 (English) (180 Mb):
Download here (163 Mb)
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Compression modes:
– Smallest size, medium quality (80%)(Lossy)(VarDCT).
– Optimal size, good quality (85%)(Lossy)(VarDCT).
– VarDCT mode (usually good for all images).
– Modular mode (sometimes good for non-photographic and art type images).
– “Visually lossless” (Butteraugli distance = 1.0)(90%)(Lossy)(VarDCT).
– Automatic (Lossless JPEG recompression (20-30% better) and “visually lossless” for other (d=1.0 q=90%)).
– Best quality, biggest size (Lossless)(100%).
– Lossless optimize JPEG XL (*.jxl)(100%).

JPEG XL uses a novel internal color space (called XYB) for high-fidelity, perceptually optimized image encoding, but it can also handle the simple YCbCr color transformation applied by JPEG.

Existing JPEG files can be losslessly transcoded to JPEG XL, significantly reducing their size. These can be restored into the exact same JPEG file, ensuring backward compatibility with existing JPEG-based applications. These features are intended to provide a smooth transition from legacy JPEG platforms to the modern JPEG XL. Both the transcoding and restoration are computationally efficient.

WebP is over 10 years old, and JPEG XL is a major upgrade over the WebP format. WebP is limited to 8-bit color depth, and in its best-compressing mode of operation, it can only store color at half of the image’s resolution (known as chroma subsampling). This causes edges of saturated colors to be smudged or pixelated in WebP. JPEG XL supports wide gamut and high dynamic range (HDR).

It includes features such as animation, alpha channels, layers, thumbnails, lossless and progressive coding to support a wide range of use cases including but not limited to photo galleries, e-commerce, social media, user interfaces and cloud storage. To enable novel applications, it also adds support for 360 degree images, image bursts, large panoramas/mosaics, and printing.

JPEG XL offers significantly better image quality and compression ratios than legacy JPEG, plus a shorter specification. It is designed for computationally efficient encoding and decoding using software implementations without the need for additional hardware acceleration, even on mobile devices.

The following people made key contributions to the JPEG XL project: Jon Sneyers, Jyrki Alakuijala, Lode Vandevenne, Luca Versari, Jan Wassenberg.

The JPEG Committee plans to submit the JPEG XL standard as a Final Draft International Standard (FDIS) in January 2021. If approved, ISO and IEC will publish it as an International Standard in July 2021.

Run only 1 active instance of the program!

Current file has its own status in the list: «running», «done» and «saved space».
Full stats:
1. Number of optimized files (total and current session).
2. Files in the queue (quantity).
3. Saved disk space (Mb) total and for each file in the list.
(You need to save files «res\size.txt» and «res\numbers.txt» before updating, if you want to save the overall statistics («Total»)).

You can specify the path to the file «cjxl.exe» manually in a separate form.

Program uses ImageMagick for pre-convert of input files and as viewer for JXL files. ImageMagick supports jxl since version 7.0.10-54.

Please send any bugs and requests to maxcompress@ya.ru whith subject “Ultra7z Images/Photos to JPEG XL Converter”

It’ free for commercial and non-commercial use!

More info about JPEG XL here

If you like my program and you want help improve it, you can help me (donate) here.

Icon made by Freepik from Flaticon.com
https://www.flaticon.com/authors/freepik

History:
2025-12-21 – v1.05
– update JPEG XL 0.11.1
– update ImageMagick 7.1.2-11
– update Exiftool 13.44
– update Avif 1.3.0
– update ffmpeg 8.0.1
– added automatic detection of the number of CPU-threads
– added button “hide banner”

2024-01-09 – v1.04
– update JPEG XL 0.9.0
– update ImageMagick 7.1.1-26
– improved compression & optimization
– improved compression for lossless JPEG transcoding
– added setting effort to 10 for extreme lossless compression
– added option “brotli_effort” (0-11)
– improved metadata processing (exif etc)
– improved compression for repack JXL with lossless JPEG transcoding
– for extraction/conversion/optimization program always tries JPEG reconstruction first
– added option “compress_boxes” (Disable/enable Brotli compression for metadata boxes)
– program always tries lossless variant for better compression, if VarDCT result is bigger than source size
– added option “Always test lossless variant for better compression”
– added option “JPEG quality, %” for conversion to JPEG whithout reconstruction
– added option “Delete source file: never/always/if result is smaller”
– added 32bit version

2021-08-22 – v1.03
– update JPEG XL 0.6.0;
– added option “Decode (reconstruct) original JPEG (extract)”;
– added option “Convert to: PNG / JPEG”;
– added copy/strip metadata (exif) information (camera,gps,date,time etc).

2021-02-16 – v1.02
– update JPEG XL 0.3.2.

2021-01-23 – v1.01
– first release.

Download Ultra7z Images/Photos to JPEG XL (jxl) Converter/Optimizer 1.05 (English) (180 Mb):
Download here (163 Mb)
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The post Ultra7z Images/Photos to JPEG XL (jxl) Converter/Optimizer 1.05 first appeared on Super Compression - useful programs/tools and information!.

Ultra RAR Optimizer 1.04 (c) 2020-2025

Use it carefully!
Please verify content of each archive.
Run only 1 active instance of the program!

How does it work?
When creating an archive in WinRAR or any other program, you can select only 1 compression algorithm for all files added at a time. Although the program provides several of them. Different algorithms are more effective for different types of files. For example, texts are better compressed using PPMD, but binary files are EXE-compression, uncompressed audio files (wav) or images (bmp) need a DELTA filter, and so on.

Ultra RAR Optimizer repacks such an archive using all possible compression algorithms, trying (sorting) different algorithms for each file type (there is a selection by file extension). At the end, it creates the smallest possible archive size (i.e. it optimizes the original archive, the content does not change!). More than 19 variants of compression! Also Optimizer compares RAR4 and RAR5/RAR7 and selects the best variant. This is why it is quite a long process (several times longer than simply creating an archive), but it will not affect the speed of unpacking the archive, it will still be very fast. The compression gain can be up to 10-20% for certain types of files! If the optimized archive is the same size as the original one or larger, the program will leave the original archive unchanged, i.e. you will not lose anything in size in any case.

For daily use, I recommend the “Normal” mode, it is fast enough and gives good results. For better compression, use the “good” or “best” modes. And if you are ready to wait longer, then “ultra”. The “Extreme” and “Extreme2” modes can be selected if the archive size is small enough (up to 10-50 MB), or if you want to get maximum compression despite a fairly long repacking process. If you have more than 4 GB of RAM, you can increase the size of the dictionary to 512 MB and higher, which can further improve compression.

Program optimizes your file to new one with «_optimized» name ending (source file will remain intact).

Download Ultra RAR Optimizer 1.04 (3 Mb):
Download here (3 mb)
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Features:
– Auto switch PPMD/DELTA/AUDIO/EXE/RGB/RAR4/RAR5/standard during creation RAR-archives.
– Full compatible with original RAR format.
– High compression ratio – usually better than WinRAR original.
– Supported formats: RAR (all versions).
– Support for recovery record.
– You can set «High CPU usage (>2 threads)» for maximum perfomance or uncheck it for low CPU usage.
– You can set «Run in background (without console output)» or uncheck it for manual process control.

Current archive has its own status in the list: «running», «done» and «saved space».
Full stats:
1. Number of optimized files (total and current session).
2. Files in the queue (quantity).
3. Saved disk space (Mb) total and for each archive in the list.
(You need to save files «res\size.txt» and «res\numbers.txt» before updating, if you want to save the overall statistics («Total»)).

The program automatically determines the path to the WinRAR installed in the system. Or you can specify the path to the file “rar.exe” manually in a separate form.

It is a freeware compressor for RAR archives!

It’ free for commercial and non-commercial use!

If you like my program and you want help improve it, you can help me (donate) here.
Contact me at maxcompress@yandex.com

History:
2025-05-07
Ultra RAR Optimizer 1.04
– Fixed support WinRAR 7.
– Added option for using WinRAR 4-6 for better compression.
– Added “Exhaustive search” option (-mcx switch). It might provide the additional compression gain for some types of redundant data. Long range search is needed to implement this mode efficiently, so the exhaustive search option activates it automatically.
– Added dictionaries 2-4 GB.

2021-12-21 – 1.03
– Improved compression of large archives with many file types.
– Improved compression in some cases.
– Deleting temp files after each iteration (instead of deleting at the end).

2021-04-18 – 1.02
– Added option “Save identical files as references”.
– Added option “Store symbolic links as links”.
– Added option “Store hard links as links”.
– Added % in statistics.
– Added time for each archive from the list.
– Added horisontal scroll in list of files.
– Added “Wait…” on the button “Start” after click on it.
– Improved ppmd compression in extreme2 mode.
– Copy original archive if result is greater.
– Improved handling of non-standard file names (utf-8)

2020-06-07 – 1.01
– first release

Download Ultra RAR Optimizer 1.04 (3 Mb):
Download here (3 mb)
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How does it work (UPX)?
UPX is an advanced executable file compressor. UPX will typically reduce the file size of programs and DLLs by around 100%-200%, thus reducing disk space, network load times, download times and other distribution and storage costs.

Download Ultra7z EXE/DLL Compressor 1.02 (UPX Optimizer) (English) (5 Mb):
Download here (5 mb)
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UPX achieves an excellent compression ratio and offers very fast decompression. Your executables suffer no memory overhead or other drawbacks for most of the formats supported, because of in-place decompression. UPX uses a data compression algorithm called UCL, which is an open-source implementation of portions of the proprietary NRV (Not Really Vanished) algorithm. UCL has been designed to be simple enough that a decompressor can be implemented in just a few hundred bytes of code. UCL requires no additional memory to be allocated for decompression, a considerable advantage that means that a UPX packed executable usually requires no additional memory. UPX also can use LZMA.

UPX can compress all executables, be it AOUT, ELF, libc4, libc5, libc6, Shell/Perl/Python scripts, standalone Java .classm, binaries, or whatever. All scripts and programs will work just as before. Compressed programs are completely self-contained. No need for any external program.

Unpacking mechanism.
A simple routine stub code is embedded into the now packed binary, that also acts as the entry point. As it starts running, it will allocate a new memory region in which it unpacks the original code. Then the program code jumps to the Original Entry Point (OEP) and continues with the execution of the original, unpacked program.

How does it work (UPX Optimizer)?
Different parameters of the LZMA algorithm give different compression ratios. Ultra7z EXE/DLL Compressor iterates through several such parameters and selects the best result. The time is a little longer, but the compression will be better. Even compared to the ultra-brute mode. It has 5 levels of optimization for LZMA.

Used programs:
UPX – the Ultimate Packer for eXecutables – https://upx.github.io/
UPX is Copyright (c) 1996-2025 by Markus F.X.J. Oberhumer, Laszlo Molnar & John F. Reiser.

Supported formats:
Portable Executable (PE, EXE and DLL files):
– ARM (Windows CE)
– 32-bit x86 (Windows Desktop)
– 64-bit x86-64 (Windows Desktop, still experimental)
– RTM32 (DOS extender, as generated by Borland C/Pascal compilers)
COFF executables, used by DJGPP2
Raw 8086/DOS files:
– DOS/COM
– DOS/EXE
– DOS/SYS
Watcom/LE (used by DOS4G, PMODE/W, DOS32A and CauseWay)
TMT/adam (as generated by the TMT Pascal compiler)
Atari/TOS
Linux kernel, i386, x86-64 and ARM
Linux Executable and Linkable Format, i386, x86-64, ARM, PowerPC, MIPS
PlayStation 1/EXE (MIPS R3000)
Darwin Mach-O, ppc32, i386, and x86-64
UPX does not currently support PE files containing CIL code intended to run on the .NET Framework.

Run only 1 active instance of the program!

Current file has its own status in the list: «running», «done» and «saved space».
Full stats:
1. Number of optimized files (total and current session).
2. Files in the queue (quantity).
3. Saved disk space (Mb) total and for each file in the list.
(You need to save files «res\size.txt» and «res\numbers.txt» before updating, if you want to save the overall statistics («Total»)).

Please send any bugs and requests to maxcompress@yandex.com whith subject “Ultra7z EXE/DLL Compressor”

It’ free for commercial and non-commercial use!

If you like my program and you want help improve it, you can help me (donate) here.

Icon made by iconixar from Flaticon:
https://www.flaticon.com/authors/iconixar

History:
2025-04-27
Ultra7z EXE/DLL Compressor 1.02 (UPX Optimizer)
-update UPX 5.0

2021-08-16 – 1.01
– first release

Download Ultra7z EXE/DLL Compressor 1.02 (UPX Optimizer) (English) (5 Mb):
Download here (5 mb)
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The post Ultra7z EXE/DLL Compressor 1.02 (UPX Optimizer) first appeared on Super Compression - useful programs/tools and information!.

Download Ultra Compression Params Generator 1.02 (8 Mb):
Download here (8 mb)
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BSC is a high performance file compressor based on lossless, block-sorting data compression algorithms.

Copyright (c) 2009-2024 Ilya Grebnov <ilya.grebnov@gmail.com>
See file AUTHORS for a full list of contributors.

More info about BSC available at official site

Features:
The source code is available under Apache License Version 2.0.
GPU acceleration using NVIDIA CUDA technology.
64 bit and multi-core systems support.
Highly optimized code and C++ interface for superior performance.
Multiple algorithms that allows software fine-tuning for maximum speed or compression efficiency.
CRC-32 calculation routine for data integrity verification.
In-place compression and decompression to save memory.

Block sorting algorithm:
-m0 – Burrows Wheeler Transform
-m3..8 – Sort Transform of order n.

Contexts for sorting:
-cf Following contexts
-cp Preceding contexts
-ca Autodetect (experimental)

Entropy encoding algorithm:
-e0 Fast Quantized Local Frequency Coding
-e1 Static Quantized Local Frequency Coding
-e2 Adaptive Quantized Local Frequency Coding (best compression)

Preprocessing options:
-p Disable all preprocessing techniques
-s Enable segmentation (adaptive block size), default: disable
-r Enable structured data reordering, default: disable
-l Enable Lempel-Ziv preprocessing, default: enable
-H LZP dictionary size in bits, default: -H15, minimum: -H10, maximum: -H28
-M LZP minimum match length, default: -M128, minimum: -M4, maximum: -M255

Platform specific options:
-G Enable Sort Transform acceleration on NVIDIA GPU, default: disable
-P Enable large 2MB RAM pages, default: disable
-t Disable parallel blocks processing, default: enable
-T Disable multi-core systems support, default: enable

Memory usage:
bsc compresses large files in blocks. Multiple blocks can be processed in parallel on multiple-core CPU. At decompression time, the block size used for compression is read from the header of the compressed file. The block size and number of blocks processed in parallel affects both the compression ratio achieved, and the amount of memory needed for compression and decompression. Compression and decompression requirements are the same and in bytes, can be estimated as 16Mb + 5 x block size x number of blocks processed in parallel.

GPU memory usage for NVIDIA CUDA technology is different from CPU memory usage and can be estimated as 20 x block size for ST, 21 x block size for forward BWT and 7 x block size for inverse BWT.

—————————————————————–

Kanzi is a modern, modular, portable and efficient lossless data compressor implemented in C++.

Kanzi 2.3 (c) Frederic Langlet
Credits: Matt Mahoney, Yann Collet, Jan Ondrus, Yuta Mori, Ilya Muravyov,
Neal Burns, Fabian Giesen, Jarek Duda, Ilya Grebnov

More info about Kanzi available at official site

modern: state-of-the-art algorithms are implemented and multi-core CPUs can take advantage of the built-in multi-threading.
modular: entropy codec and a combination of transforms can be provided at runtime to best match the kind of data to compress.
portable: many OSes, compilers and C++ versions are supported (see below).
expandable: clean design with heavy use of interfaces as contracts makes integrating and expanding the code easy. No dependencies.
efficient: the code is optimized for efficiency (trade-off between compression ratio and speed).

Unlike the most common lossless data compressors, Kanzi uses a variety of different compression algorithms and supports a wider range of compression ratios as a result. Most usual compressors do not take advantage of the many cores and threads available on modern CPUs (what a waste!). Kanzi is multithreaded by design and uses several threads by default to compress blocks concurrently. It is not compatible with standard compression formats.

Kanzi is a lossless data compressor, not an archiver. It uses checksums (optional but recommended) to validate data integrity but does not have a mechanism for data recovery. It also lacks data deduplication across files. However, Kanzi generates a bitstream that is seekable (one or several consecutive blocks can be decompressed without the need for the whole bitstream to be decompressed).

There are a few scenarios where Kanzi could be a better choice:
gzip, lzma, brotli, zstd are all LZ based. It means that they can reach certain compression ratios only. Kanzi also makes use of BWT and CM which can compress beyond what LZ can do.

These LZ based compressors are well suited for software distribution (one compression / many decompressions) due to their fast decompression (but low compression speed at high compression ratios). There are other scenarios where compression speed is critical: when data is generated before being compressed and consumed (one compression / one decompression) or during backups (many compressions / one decompression).

Kanzi has built-in customized data transforms (multimedia, utf, text, dna, …) that can be chosen and combined at compression time to better compress specific kinds of data.

Kanzi can take advantage of the multiple cores of a modern CPU to improve performance

It is easy to implement a new transform or entropy codec to either test an idea or improve compression ratio on specific kinds of data.

The Block compressor cuts the input file into blocks (the size can be provided on the command line with the ‘block’ option up to 1GB). Optionally, a checksum for the chunk of data can be computed and stored in the output.

As a first step, it applies one or several transforms (default is BWT+MTFT+ZRLT) to turn the block into a smaller number of bytes. Up to 8 transforms can be provided. EG: BWT+RANK+ZRLT.

As a second step, entropy coding is performed (to turn the block into a smaller number of bits).

Available transforms:
BWT: Burrows Wheeler Transform (https://en.wikipedia.org/wiki/Burrows-Wheeler_transform) is a transform that reorders symbols in a (reversible) way that is more amenable to entropy coding. This implementation uses a linear time foward transform and parallel inverse tranform.
BWTS: Burrows Wheeler Transform by Scott is a bijective variant of the BWT (slower).
LZ: Lempel Ziv (https://en.wikipedia.org/wiki/LZ77_and_LZ78). An implementation of the dictionary based LZ77 transform that removes redundancy in the data.
LZX: Lempel Ziv Extra. Same as above with a bigger hash table and/or extra match checks.
RLT: Run Length Transform (https://en.wikipedia.org/wiki/Run-length_encoding). A simple transform that replaces runs of similar symbols with a compact representation.
ZRLT: Zero Run Length Transform. Similar to RLT but only processes runs of 0. Usually used post BWT.
MTFT: Move-To-Front Transform (https://en.wikipedia.org/wiki/Move-to-front_transform). A transform that reduces entropy by assigning shorter symbols to recent data (works like a LRU cache). Usually used post BWT.
RANK: Rank Transform: A transform that that reduces entropy by assigning shorter symbols based on symbol frequency ranks. Usually used post BWT.
EXE: A transform that reduces the entropy of executable files (X86 & ARM64) by replacing relative jump addresses with absolute ones.
TEXT: A text transform that uses a dictionary to replace common words with their index.
ROLZ: Reduced Offset Lempel Ziv. An implementation of LZ that replaces match offsets with indexes of match offsets. It yields a more compact output at the cost of an extra indirection (hence slower decoding speeds).
ROLZX: Extended ROLZ with more match searches and a more compact encoding.
SRT: Sorted Rank Transform: A transform that that reduces entropy by assigning shorter symbols based on symbol frequency ranks. Usually used post BWT.
LZP: Lempel Ziv Prediction can be described as an LZ implementation with only one possible match (hence the offset is not even emitted). It is pretty weak (but fast) and usually used prior to a BWT to remove some redundancy and speed up coding.
MM: Mutimedia transform is a fast transform that removes redundancy in correlated channels in some multimedia files (EG. wav, pnm).
UTF: a fast transform replacing UTF-8 codewords with aliases based on frequencies.
PACK: a fast transform replacing unused symbols with aliases based on frequencies.

Entropy codecs.
Several entropy codecs have been implemented (sorted by increasing compression):
Huffman: The codec is a fast canonical Huffman implementation. Both encoder and decoder use tables to compute code lengths and values instead of a tree (for speed purpose).
RANGE: A fast implementation that uses pre-computed block statistics.
ANS: Based on Range Asymmetric Numeral Systems by Jarek Duda (specifically an implementation by Fabian Giesen). Works in a similar fashion to the Range encoder but uses only 1 state (instead of bottom and range) and does encoding in reverse byte order.
FPAQ: A binary arithmetic codec based on FPAQ1 by Matt Mahoney. Uses a simple, adaptive order 0 predictor based on frequencies. Fast and compact code.
CM: A binary arithmetic codec derived from BCM by Ilya Muravyov. Uses context mixing of counters to generate a prediction. Efficient and decently fast.
TPAQ: A binary arithmetic codec based initially on Tangelo 2.4 (itself derived from FPAQ8). Uses context mixing of predictions produced by one layer neural networks. The initial code has been heavily tuned to improve compression ratio and speed. Slowest but usually best compression ratio.

Compression levels:
0 = NONE&NONE (store)
1 = PACK+LZ&NONE
2 = PACK+LZ&HUFFMAN
3 = TEXT+UTF+PACK+MM+LZX&HUFFMAN
4 = TEXT+UTF+EXE+PACK+MM+ROLZ&NONE
5 = TEXT+UTF+BWT+RANK+ZRLT&ANS0
6 = TEXT+UTF+BWT+SRT+ZRLT&FPAQ
7 = LZP+TEXT+UTF+BWT+LZP&CM
8 = EXE+RLT+TEXT+UTF&TPAQ
9 = EXE+RLT+TEXT+UTF&TPAQX

———————————————————————-

Run only 1 active instance of the program!

Current file has its own status in the list: «running», «done» and «saved space».
Full stats:
1. Number of compressed files (total and current session).
2. Files in the queue (quantity).
3. Saved disk space (Mb) total and for each file in the list.
(You need to save files «res\size.txt» and «res\numbers.txt» before updating, if you want to save the overall statistics («Total»)).

You can specify the path to the file «bsc.exe» and «Kanzi64.exe» manually in a separate form.

Please send any bugs and requests to maxcompress@ya.ru whith subject “Ultra Compression Params Generator”.

It’ free for commercial and non-commercial use!

If you like my program and you want help improve it, you can help me (donate) here.

Icon made by Swifticons from Flaticon:
https://www.flaticon.com/authors/swifticons

Disclaimer: use at your own risk. Always keep a copy of your original files!

History:
2024-11-25
Ultra Compression Params Generator 1.02
-new options for Kanzi:
-added smart modes to select the best compression options (based on prepared tests)
-max number of transforms has been increased to 5
-added option with unpacking time limit (for fast decompression)
-added option “select all” for transforms
-added fast modes for tests

2024-05-05 – 1.01
– first release

Download Ultra Compression Params Generator 1.02 (8 Mb):
Download here (8 mb)
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How does it work?
When creating an archive in 7-zip or any other program, you can select only 1 compression algorithm for all files added at a time. Although the program provides several of them. Different algorithms are more effective for different types of files. For example, texts are better compressed using PPMD, but binary files are LZMA, uncompressed audio files (wav) or images (bmp) need a DELTA filter, and so on.

Ultra7z Optimizer repacks such an archive using all possible compression algorithms, trying (sorting) different algorithms for each file type (there is a selection by file extension). At the end, it creates the smallest possible archive size (i.e. it optimizes the original archive, the content does not change!). This is why it is quite a long process (several times longer than simply creating an archive), but it will not affect the speed of unpacking the archive, it will still be very fast (unlike other superarchivers like PAQ, where you have to wait for hours to unpack, here it takes only a few seconds or even less). The compression gain can be up to 10-20% for certain types of files! If the optimized archive is the same size as the original one or larger, the program will leave the original archive unchanged, i.e. you will not lose anything in size in any case.

Thus, the program can also be used as a regular Converter from various types of archives (zip, rar, etc.) to 7z archives.

Download Ultra7z Optimizer 1.15 (5 Mb):
Download here (3 mb) (Turbobit)
Mirror 1 (Uploadrar.com)
Mirror 2 (Uploady.io)
Mirror 3 (KatFile)

For daily use, I recommend the “Normal” mode, it is fast enough and gives good results. For better compression, use the “good” or “best” modes. And if you are ready to wait longer, then “ultra”. The “Extreme” and “Extreme2” modes can be selected if the archive size is small enough (up to 10-50 MB), or if you want to get maximum compression despite a fairly long repacking process. If you have more than 4 GB of RAM, you can increase the size of the LZMA dictionary to 256 MB and PPMD to 1024 MB, which can further improve compression. Also, a small improvement usually gives an increase of the parameter “LZMA word Size” to 273.

The main difference between Ultra7z Optimizer and other similar repackaging programs is that it works much faster, because it does not go through all the compression options (and there are more than 400 of them), and tries only the main ones (giving the greatest gain), without chasing hundreds of percent.

Features:
– Auto switch PPMD/LZMA/LZMA2/DELTA/DEFLATE/BZIP2 during creation 7z-archives (+ improved (tuned) lzma for jpg, bmp, wav, exe…)
– Full compatible with original 7z format.
– High compression ratio – better than non tuned 7-zip original.
– Supported formats: 7z, ZIP, ZIPX, CAB, RAR, ZSTD, ARJ, LZH, GZIP, BZIP2, Z, CHM, ISO, NSIS, TAR, CPIO, RPM and DEB (formats supported by 7-zip).

Program optimizes your file to new one with «_optimized» name ending (source file will remain intact).

Current archive has its own status in the list: «running», «done» and «saved space».
Full stats:
1. Number of optimized files (total and current session).
2. Files in the queue (quantity).
3. Saved disk space (Mb) total and for each archive in the list.

It’ free for commercial and non-commercial use!
If you like my program and you want help improve it, you can help me (donate) here.
Contact me at maxcompress@ya.ru

History:
2024-10-17
Ultra7z Archive Optimizer 1.15
– Update 7z 24.08 (with option “-myv=2201” for compatibility with previous versions).
– Faster speed with option “Bruteforce level: 1 -> 6”. Ultra7z cuts out the first 5/10/15/20/25 MB and checks the compression only on them instead of the full size.
– Improved compression in some cases.
– Improved compression for single file-extension (option “bruteforce LZMA” in extreme2 mode).
– Improved compression for EXE (option “bruteforce LZMA” in extreme2 mode).
– Support unpack ZSTD and RAR-7 archives and 7z (lz4/lz5/zstd/brotli/flzma2/lizard).
– Faster pack/unpack (asymmetric decompression) with option “No PPMD for sizes (MB)>50 Mb”.
– Faster delta tests.
– Faster compression in multithreaded mode (optimization for jobs>1).

2022-04-24 – 1.14
– Update 7z 21.07.
– Option “Use 7z 19.0”
– Improved compression in some cases: added max dict size for LZMA 3840 Mb.
– Improved compression in some cases: added fast tests for delta 1-32.
– Improved compression in some cases: added bt5.
– Improved compression for graphics files in some cases in best+ modes.
– Final check with small LZMA dictionary (this check helps to avoid file loss).
– “No-ppmd” and “No-bzip2” options (for faster asymmetric decompression).
– On/Off option for limit compression memory 80%.
– Save source archive extension if result is larger.

2021-11-20 – 1.13
– Improved compression of large archives with many file types.
– Improved “extreme2” compression with “mc” parameter for LZMA.
– Improved PPMD compression in “extreme2”.
– Improved “normal” compression in some cases.
– Added 2 new options: “Set multithreading mode for filters” (faster compression), “Set Large Pages mode” (faster 5-10% on big archives).
– Default 2 parallel jobs (faster).

2021-04-04 – 1.12
– Added parallel processing of tasks – faster, but need more CPU usage and memory (RAM)(2-6 parallel jobs).
– Default 128 Mb for LZMA Dictionary.
– Deleting temp files after each iteration (instead of deleting at the end).
– Added 2 tests at the end in ultra/extreme modes (solid-3 and solid-4).
– Improved EXE compression in some cases.
– Improved fb detection for bt2/bt3 in extreme2.
– Internal optimizations.

2021-01-03 – 1.09
– Improved EXE compression.
– Improved PPMD compression.
– Improved compression of some typical extensions.
– Improved fb detection.
– Improved qs check.
– Added sizes 1536 Mb for LZMA/LZMA2 and 2048 Mb for PPMD.
– Added bt2, bt3, delta:2 in extreme2 mode.
– Added time for each archive from the list.
– Added “Wait…” on the button “Start” after click on it.
– Fixed “Low CPU usage” mode – now it uses less resources.
– Some internal optimizations.

2020-07-05 – 1.07
– Improved compression in some cases.
– Added 1 new variant for graphics file in best+ modes.
– Added method “copy” for totally incompressible files.
– Improved fb detection for some files.
– Added compare with simple solid LZMA and LZMA2 at the end.
– Added option – “Low CPU usage (background, only 1 thread)(slow)”.
– Added % in statistics.
– Added horisontal scroll in list of files.

2020-05-19
Ultra7z Archive Optimizer 1.05
– Some internal optimizations.
– New stats: start and finish time, progress, count trials.
– New option – “Create new archive instead of deleting (with “_optimized” name)”.
– New option – “High CPU usage for BZIP2 (>2 threads)”.
– New option – “High CPU usage for LZMA2 (>2 threads)”.
– Fixed false positives of some antiviruses.

2020-05-11 – 1.04
– Improved compression on some files – +1 trial in “normal”, +3 trials in “good” and other modes.
– New option in GUI – Run in background (without console output).
– Main window doesn’t freeze during operation.
– Current archive has its own status in the list: “running”, “done” and “saved space”.
– New stats:
1. Number of optimized files (total and current session).
2. Files in the queue (quantity).
3. Saved disk space (Mb) for each archive in the list.
– You need to save files “res\size.txt” and “res\numbers.txt” before updating, if you want to save the overall statistics (“Total”).

2020-05-04 – 1.03
-improved GUI: added sizes of saved disk space (Mb): last file, total last session, total.
-improved GUI: check for new version – Help -> Check updates.

2020-04-25 – 1.02
-improved GUI: you can add multiple files at once by drag-n-drop

2020-04-20 – 1.01
-updated 7-zip 19.0 Final
-new GUI
-LZMA2 in normal mode
-some optimizations in compression trials

Download Ultra7z Optimizer 1.15 (5 Mb):
Download here (3 mb) (Turbobit)
Mirror 1 (Uploadrar.com)
Mirror 2 (Uploady.io)
Mirror 3 (KatFile)

The post Ultra7z Archive Optimizer 1.15 first appeared on Super Compression - useful programs/tools and information!.

Program uses ImageMagick for test PSNR of result images.

How does it work?
The Portable Network Graphics (PNG) is a format for storing compressed raster graphics. The compression engine is based on the Deflate method. Unlike other lossless compression schemes, PNG compression does not depend solely on the statistics of the input, but it may vary within wide limits, depending on the compressor’s implementation. A good PNG encoder must be able to take informed decisions about the factors that affect the size of the output. The purpose of this article is to provide information about these factors, and to give advice on implementing efficient PNG encoders.

The PNG compression works in a pipeline manner.
In the first stage, the image pixels are passed through a lossless arithmetic transformation named delta filtering, or simply filtering, and sent further as a (filtered) byte sequence. Filtering does not compress or otherwise reduce the size of the data, but it makes the data more compressible.

In the second stage, the filtered byte sequence is passed through the Ziv-Lempel algorithm (LZ77), producing LZ77 codes that are further compressed by the Huffman algorithm in the third and final stage. The combination of the last two stages is referred to as the Deflate compression, a widely-used, patent-free algorithm for universal, lossless data compression. The maximum size of the LZ77 sliding window in Deflate is 32768 bytes, and the LZ77 matches can be between 3 and 258 bytes long.

The good encoders are at least applying the filtering heuristics.

Use programs:
ECT (Efficient Compression Tool) – https://github.com/fhanau/Efficient-Compression-Tool
Pingo – https://css-ig.net/
PNGWolfZopfli – https://github.com/jibsen/pngwolf-zopfli
OptiPNG – http://optipng.sourceforge.net
TruePNG – http://x128.ho.ua/pngutils.html
AdvanceCOMP – http://www.advancemame.it
Oxipng – https://github.com/shssoichiro/oxipng
Zopfli – https://github.com/google/zopfli
Zopflipng bin – https://github.com/imagemin/zopflipng-bin
PNGOUT – http://advsys.net/ken
DeflOpt – http://www.walbeehm.com/download
Defluff – http://j-o.users.sourceforge.net/
ImageMagick – https://imagemagick.org

Zopfli Compression Algorithm is a compression library programmed in C to perform very good, but slow, deflate or zlib compression. Zopfli Compression Algorithm was created by Lode Vandevenne and Jyrki Alakuijala, based on an algorithm by Jyrki Alakuijala.

There are a number of factors that affect the size of PNG image files, such as the number of colors in the image and whether the image data is stored as RGBA data or in the form of references to a color palette. The main factor is the quality of the Deflate compression used to compress the image data, which is in turn affected by the quality of the compressor and how well the data to be compressed is arranged.

The PNG format supports a number of scanline filters that transform the image data by relating nearby pixels mathematically. Choosing the right filters for each scanline can make the image data more compressible. It is, however, infeasible for non-trivial images to find the best filters so typical encoders rely on a couple of heuristics to find good filters.

PNGWolf employs a genetic algorithm to find better filter combinations than traditional heuristics. It derives a couple of filter combinations heuristically, adds a couple of random combinations, and then looks how well each combination compresses. Two very different combinations may compress similarily well, for instance, one combination may be very good for the first couple of scanlines, while the other may be very good for the last couple of scanlines. So taking the beginning of one combination and the tail of the other to make a new one may result in a combination that compresses better then the original two.

Run only 1 active instance of the program!

Current file has its own status in the list: «running», «done» and «saved space».
Full stats:
1. Number of optimized files (total and current session).
2. Files in the queue (quantity).
3. Saved disk space (Mb) total and for each file in the list.
(You need to save files «res\size.txt» and «res\numbers.txt» before updating, if you want to save the overall statistics («Total»)).

Please send any bugs and requests to maxcompress@ya.ru whith subject “Ultra7z PNG Lossless Optimizer”

It’ free for commercial and non-commercial use!

If you like my program and you want help improve it, you can help me (donate) here.

Icon made by prettycons from Flaticon:
https://www.flaticon.com/authors/prettycons

History:
2024-06-29
Ultra7z PNG Lossless Optimizer 1.08
– Update ECT 0.9.5, Oxipng 9.1.1, OptiPng 0.7.8, Pingo 1.23.8, AdvanceComp 2.6, ImageMagick 7.1.1-34
– Fixed some bugs.

2023-09-03
1.07
– Improved compression:
— new methods for testing variants (filters: fast/good/best).
— added new program: PNGOUT.
– Default multithreading for ECT/OxiPNG (much faster on modern CPU).
– Update ECT 0.9.4, Oxipng 8.0, Pingo 1.11, AdvanceComp 2.5, ImageMagick.
– Fixed some bugs.

2021-07-25
1.06
– Improved compression:
— added new modes: “Extreme” and “Extreme+”.
— added new programs: Pingo, Oxipng, Zopflipng, Defluff.
– Improved compression for ECT:
— added options: “-allfilters”, “-allfilters-b” and “ECT extreme mode (slow)”.
– Added option “Interlaced”.
– Added option “Enable strict losslessness”.
– Added option “Test identity of the result (PSNR)” (by ImageMagick).
– Added option “Number of threads for ECT and OxiPNG (1-16)”.
– Added time for each file from the list.
– Added “Wait” on the button “Start” after click on it.

2020-06-29
1.01
– first release

Download Ultra7z PNG Lossless Optimizer 1.08 (25 Mb):
Download here (25 mb)
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The post Ultra7z PNG Picture Lossless Optimizer 1.08 first appeared on Super Compression - useful programs/tools and information!.

Features:
– Reduce the size of PDF files.
– Full compatible with original PDF format.
– Supported formats: PDF.
– You can set «Run in background (without console output)» or uncheck it for manual process control.

Image resolution (for lossy mode):
– screen (low resolution);
– ebook (medium resolution);
– printer (print optimized);
– prepress (prepress optimized).

DPI from 50 to 600.

Programs:
Cpdfsqueeze (Copyright Coherent Graphics Ltd) – https://www.coherentpdf.com
Pdfsizeopt – https://github.com/pts/pdfsizeopt
Ghostscript – https://www.ghostscript.com

Cpdfsqueeze is a lossless compressor for PDF files, which works by rearranging and coalescing content within the file. Very fast!

Pdfsizeopt is a program for converting large PDF files to small ones. If the input PDF has many images or large images, pdfsizeopt can be very slow. Pdfsizeopt can use the following external tools to make images in embedded PDF files smaller: sam2p, jbig2, pngout.

Ghostscript is an interpreter for the PostScript language and PDF files. It has been under active development for over 30 years and has been ported to several different systems during this time. Ghostscript consists of a PostScript interpreter layer and a graphics library.

Run only 1 active instance of the program!

Current file has its own status in the list: «running», «done» and «saved space».
Full stats:
1. Number of optimized files (total and current session).
2. Files in the queue (quantity).
3. Saved disk space (Mb) total and for each file in the list.
(You need to save files «res\size.txt» and «res\numbers.txt» before updating, if you want to save the overall statistics («Total»)).

You can specify the path to the file «cpdfsqueeze.exe» manually in a separate form.

Please send any bugs and requests to maxcompress@ya.ru whith subject “Ultra7z PDF Lossless Optimizer”

It’ free for commercial and non-commercial use!

If you like my program and you want help improve it, you can help me (donate) here.

Icon made by Freepik from Flaticon.com
https://www.flaticon.com/authors/freepik

History:
2021-09-19 – 1.01
– first release.

Download Ultra7z PDF Lossless Optimizer & Compressor 1.01 (English) (38 Mb):
Download here (38 Mb)
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The post Ultra7z PDF Lossless Optimizer & Compressor 1.01 first appeared on Super Compression - useful programs/tools and information!.

MP3packer
Copyright (c) 2006-2012 Reed Wilson (“Omion”)
cedilla AT gmail DOT com

In “Good” mode program try choose the minimum frame size to fit the data and will also minimize the data size. This is completely lossless, and is equivalent to decompressing a ZIP file and recompressing with a more aggressive setting. In “Best” mode it attempts to minimize the data by doing a brute-force search for the optimal parameters, so it takes longer than it would normally.

Features:
– Reduce the size of high bitrate CBR files, turning them into VBR files.
– Writes valid LAME Xing header for proper VBR seeking.
– Full compatible with original MP3 format.
– Supported format: MP3.
– Option “Strip metadata (ID3v2 tags etc)”.
– Option “Copy time creation from source file”.
– You can set «Run in background (without console output)» or uncheck it for manual process control.

Run only 1 active instance of the program!

Current file has its own status in the list: «running», «done» and «saved space».
Full stats:
1. Number of optimized files (total and current session).
2. Files in the queue (quantity).
3. Saved disk space (Mb) total and for each file in the list.
(You need to save files «res\size.txt» and «res\numbers.txt» before updating, if you want to save the overall statistics («Total»)).

You can specify the path to the file «mp3packer.exe» manually in a separate form.

Please send any bugs and requests to maxcompress@ya.ru whith subject “Ultra7z MP3 Lossless Optimizer”

It’ free for commercial and non-commercial use!

If you like my program and you want help improve it, you can help me (donate) here.

Icon made by Dimitry Miroliubov from Flaticon:
https://www.flaticon.com/authors/dimitry-miroliubov

History:
2021-06-07
Ultra7z MP3 Lossless Optimizer 1.02
-internal optimizations

2020-06-24 – 1.01
– first release

Download Ultra7z MP3 Lossless Optimizer 1.02 (3 Mb):
Download here (3 mb)
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The post Ultra7z MP3 Music Lossless Optimizer 1.02 first appeared on Super Compression - useful programs/tools and information!.

Please verify content of each file after optimizing.
Run only 1 active instance of the program!.

Features:
– Maximum compression for ZIP archives and other files without quality loss (ZIP, DOCX, XLSX, PPTX, XLSM, XLSB, DOCM, PPTM, ODT, ODS, ODP, ODG, ODF, ODB, APK, JAR, WAR, EAR, XPI, FB3, EPUB, CBZ) – up to 10-30%!
– Full compatible with original format.
– High compression ratio – better than original program.
– Batch processing of files (drag-n-drop).
– Compression modes: fast (faster), normal, good or best (slowly).
– Compression of graphic files/images inside archives without loss in quality (Lossless) up to 5-30%!
– Option “Preserve file attributes (time stamps, file access rights, etc.)”.
– You can set “Low CPU usage (only 2 threads)” or uncheck it for best perfomance.
– You can set “Run in background (without console output)” or uncheck it for manual process control.

Used programs:
ECT (Efficient Compression Tool) (c) Felix Hanau – https://github.com/fhanau/Efficient-Compression-Tool
AdvanceCOMP (c) Andrea Mazzoleni – http://www.advancemame.it

It is a freeware compressor/optimizer for:
1. ZIP archives (compressed (zipped) folder, WinZip, WinRar, 7-zip and other archivers).
2. Documents MS Office (DOCX, XLSX, PPTX, XLSM, XLSB, DOCM, PPTM)(word DOCX, tables excel XLSX and presentations powerpoint PPTX).
3. Documents Libre/OpenOffice (ODT, ODS, ODP, ODG, ODF, ODB)(Writer ODT, tables Calc ODS, presentations Impress ODP, pictures Draw ODG, Base ODB, formulas Math ODF).
4. Apps for Android smartphones (APK).
5. E-Books (EPUB, FB3).
6. Comics (CBZ).
7. Java files (JAR, WAR, EAR).
8. Mozilla Firefox Extensions (XPI).

Current archive has its own status in the list: «running», «done» and «saved space».
Full stats:
1. Number of optimized files (total and current session).
2. Files in the queue (quantity).
3. Saved disk space (Mb) total and for each archive in the list.
(You need to save files «res\size.txt» and «res\numbers.txt» before updating, if you want to save the overall statistics («Total»)).

Please send any bugs and requests to maxcompress@ya.ru whith subject “Ultra7z ZIP Optimizer”
Use it carefully! Please create backup copy before use it.

Icon made by Eucalyp from www.flaticon.com
(https://www.flaticon.com/authors/eucalyp)

It’ free for commercial and non-commercial use!

If you like my program and you want help improve it, you can help me (donate) here.

History:
2021-05-09
Ultra7z ZIP Optimizer 1.05
– improved compression by adding:
ECT (Efficient Compression Tool) (c) Felix Hanau
and
AdvanceCOMP (c) Andrea Mazzoleni
– added option “Preserve file attributes (time stamps, file access rights, etc.)”
– added modes fast,normal,good,best
– added time start and finish
– added % in statistics
– added horisontal scroll in list of files

2020-05-24 – 1.01

Download Ultra7z ZIP Optimizer 1.05 (4 Mb):
Download here (3 mb)
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