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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The post Ultra RAR Optimizer 1.04 first appeared on Super Compression - useful programs/tools and information!.

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!.

Features:
– High compression ratio.
– Supported formats: avi, mp4, mkv, webm, mpg …
– Automatic/manual mode for optimal compression.
– Quality factor (CRF, 1-51), video/audio bitrate (kb/s).
– Option for lossy compression to a smaller size.
– Option for lossless compression.
– Support for encoding and decoding on AMD and Nvidia video cards (the speed is much higher than on the processor).
– Batch video processing (you can add multiple files at once for conversion).
– Multithreading support – number of jobs (threads).
– Encoder for compression: AV1/H.265/H.264/VP9/VP8/Xvid/GIF.
– Codec for video decoding: dxva2, d3d11va, cuda.
– Convert video to GIF.
– Convert audio to MP3, OPUS, OGG, FLAC, AAC, WAV.
– Options “Reduce the size to …” (in megabytes or % of the original video size).
– You can set «Run in background (without console output)» or uncheck it for manual process control.
– FOSS and royalty-free.

Compression:
– about 50% smaller than H.264 for same visual quality and 30% smaller than H.265

Compression modes:
– Smallest size, low quality.
– Medium size, medium quality.
– Optimal size, good quality.
– Large size, better quality.
– “Visually lossless”.
– Best quality, biggest size (Lossless).

Download Ultra7z Video to AV1/H265/H264/GIF/MP3 Converter 1.04 (English) (58 Mb):
Download here
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AV1 was developed as a successor to VP9 by the Alliance for Open Media (AOMedia), a consortium founded in 2015 that includes semiconductor firms, video on demand providers, video content producers, software development companies and web browser vendors. The AV1 bitstream specification includes a reference video codec. In 2018 Facebook conducted testing that approximates real world conditions, the AV1 reference encoder achieved 34%, 46.2% and 50.3% higher data compression than libvpx-vp9, x264 high profile, and x264 main profile respectively. Like VP9, but unlike H.264/AVC and HEVC, AV1 has a royalty-free licensing model that does not hinder adoption in open-source projects.

It was developed by the Alliance for Open Media, which counts Amazon, Apple, ARM, Facebook, Google, Intel, Microsoft, Mozilla, Netflix, Nvidia and Samsung among its members, and is designed to offer internet streaming efficiency upgrades without affecting quality. That makes it an important step in the uptake of streamed 8K video, given the more data-heavy demands of this higher-res format.

AV1 Features:
ROYALTY-FREE – Interoperable and open.
UBIQUITOUS – Scales to any modern device at any bandwith.
FLEXIBLE – For use in both commercial and non-commercial content, including user-generated content.
30% BETTER COMPRESSION – Uses less data while delivering 4k UHD video and beyond when compared to alternatives.
OPTIMIZED – Developed for the internet and related applications and services – from browsers and streaming to videoconferencing services.
LOW FOOTPRINT – Designed with a low computational footprint and optimized for hardware.
CONSISTENT, HIGHEST-QUALITY REAL-TIME VIDEO – Bringing features like 4k UHD, HDR, and WCG to real-time video.

AV1 is a traditional block-based frequency transform format featuring new techniques. Based on Google’s VP9, AV1 incorporates additional techniques that mainly give encoders more coding options to enable better adaptation to different types of input.

Frame content is separated into adjacent same-sized blocks referred to as superblocks. Similar to the concept of a macroblock, superblocks are square-shaped and can either be of size 128×128 or 64×64 pixels. Superblocks can be divided in smaller blocks according to different partitioning patterns. The four-way split pattern is the only pattern whose partitions can be recursively subdivided. This allows superblocks to be divided into partitions as small as 4×4 pixels. “T-shaped” partitioning patterns are introduced, a feature developed for VP10, as well as horizontal or vertical splits into four stripes of 4:1 and 1:4 aspect ratio. The available partitioning patterns vary according to the block size, both 128×128 and 8×8 blocks can’t use 4:1 and 1:4 splits. Moreover, 8×8 blocks can’t use “T” shaped splits. Two separate predictions can now be used on spatially different parts of a block using a smooth, oblique transition line (wedge-partitioned prediction). This enables more accurate separation of objects without the traditional staircase lines along the boundaries of square blocks. More encoder parallelism is possible thanks to configurable prediction dependency between tile rows (ext_tile).

AV1 performs internal processing in higher precision (10 or 12 bits per sample), which leads to compression improvement due to smaller rounding errors in reference imagery. Predictions can be combined in more advanced ways (than a uniform average) in a block (compound prediction), including smooth and sharp transition gradients in different directions (wedge-partitioned prediction) as well as implicit masks that are based on the difference between the two predictors. This allows combination of either two inter predictions or an inter and an intra prediction to be used in the same block.

AV1 has new optimized quantization matrices (aom_qm).

Software support:
Firefox (since version 67.0, May 2019; enabled by default on all desktop platforms – Windows, macOS and Linux for both 32-bit and 64-bit systems).
Google Chrome (since version 70, October 2018).
Opera (since version 57, 28 November 2018).
Microsoft Edge (since Windows 10 October 2018 Update (1809) with AV1 Video Extension add-on).

AV1 is an open, royalty-free video standard with an improved compression system that should allow huge data efficiency savings without reducing video quality – and that could be key going forward into a world of higher frame rates, 8K resolution, HDR standards and audio demands. As such, AV1 brings implications for those who use services such as Netflix, Disney Plus and Prime Video; people looking to buy a new TV or media streamer; and anyone interested in 8K TV. And as a catch-all compression standard there are many uses beyond, including gaming, realtime applications such as video conferencing and anything else where video streams are required.

If you want a cutting edge, next generation codec and are limited by licensing and bandwidth costs, AV1 is the way to go for you. On the other hand, if you want to support the most available (resource limited/ mobile) devices or have a need for real-time, low latency encoding, it would be better to stick to H.265(HEVC) for the time being.

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 «ffmpeg.exe» manually in a separate form.

Please send any bugs and requests to maxcompress@ya.ru whith subject “Ultra7z Video Converter”

It’ free for commercial and non-commercial use!

More info about AV1 here

Program uses FFmpeg for conversion. More info about FFmpeg 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:
2025-04-19
Ultra7z Video to AV1/H265/H264 Converter 1.04
-update FFMPEG 7.1.1;
-added auto fps (frame rate) detection from source video;
-added error message when conversion fails;
-added conversion to GIF;
-support Windows 7/8/10/11.

2023-12-11 – 1.03
– update FFMPEG 2023-07-05;
– support for Intel Quick Sync Video (much faster encoding on CPU Intel) for x264/x265(HEVC)/VP9;
– added option “FPS” (frames per second);
– fix video sizes for option “Resize video”;
– option “Resize video” now uses Lanczos algorithm, which is better than bicubic for downscaling;
– added OpenCL support for x264 (It will give a slight encoding speed boost using GPU, without hurting quality);
– added decoding options for GPU: auto, dxva2, qsv, cuda, d3d11va, opencl, vulkan, vaapi;
– added option “Deinterlace” (Reduce the noticeable flaws and improve playback quality);
– added tune settings for the x264 (e.g. film for film-like content etc)(film, animation, grain, stillimage, psnr, ssim, fastdecode, zerolatency).

2022-02-04 – 1.02
– update FFMPEG 2022-01-22 (faster AV1 encoding and other)
– added VP9/VP8/Xvid
– added option “Resize video”
– added option “Convert video to audio only” (to MP3, OPUS, OGG, FLAC, AAC, WAV)
– fix freezing for video without audio

2021-03-08 – 1.01
– first release

Download Ultra7z Video to AV1/H265/H264/GIF/MP3 Converter 1.04 (English) (58 Mb):
Download here
Mirror 1
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Mirror 3

The post Ultra7z Video to AV1/H265/H264 Converter 1.04 first appeared on Super Compression - useful programs/tools and information!.

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 (File-Upload.org)

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 (File-Upload.org)

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 of Ultra7z Images to AVIF Smart Converter:
– High compression ratio.
– Supported formats: jpg, jpeg, webp, png, tiff, tif, gif, bmp, pnm, avif, heif, heic, flif.
– Option “Strip metadata (exif etc)”.
– You can set «Run in background (without console output)» or uncheck it for manual process control.
– Option for lossy compression.
– Option for lossless compression.
– Option for smart level of compression (based on SSIM)(very slow, but effective): “Same as JPEG 85%”, “Same as WEBP 85%”, “Target SSIM = 0.97” (you can change values).

AVIF – a modern image format based on the AV1 video format, ROYALTY-FREE, interoperable and open. AVIF is a combination of the HEIF ISO standard, and a royalty-free AV1 codec by Mozilla, Xiph, Google, Cisco, and many others.

AV1 Image File Format supports High Dynamic Range (HDR) and Wide Color Gamut (WCG) images as well as Standard Dynamic Range (SDR). It supports monochrome images as well as multi-channel images with all the bit depths and color spaces specified in AV1. Also supports multi-layer images to be stored both in image items and image sequences.

It competes with HEIC which uses the same container format, build upon ISOBMFF, but HEVC for compression. Version 1.0 of the AVIF specification was finalized in February 2019.

It compresses images significantly better than older-generation formats such as WebP and JPEG. It’s supported in Chrome desktop today, and support is coming to other Chromium-based browsers, as well as Firefox. More than a half of an average website’s bandwidth is spent on images. Improved image compression can save bandwidth and improve overall performance of the web.

AVIF features:
– High dynamic range.
– 8, 10, 12 bit color depth.
– Lossless compression and lossy compression.
– Monochrome (alpha/depth) or multi-components.
– Any color-space including: wide color gamut, ISO/IEC CICP and ICC profiles.
– 4:2:0, 4:2:2, 4:4:4 chroma subsampling.
– Film grain.

AVIF is natively supported in Google Chrome and by many other tools and software libraries. Developers have also added support to a variety of image editing tools.

On 14 December 2018 Netflix published the first .avif sample images, and support was added in VLC. Microsoft announced support with the Windows 10 “19H1” preview release, including support in File Explorer, Paint and multiple APIs, together with sample images. Paint.net added support for opening AVIF files in September 2019 and the ability to save AVIF format images in an August 2020 update. GIMP plugin implementation has been developed supporting both 3.x and 2.10.x plugin APIs. Native AVIF import and export was added to GIMP in October 2020.

In August 2020, Google Chrome version 85 was released with full AVIF support. Mozilla is working on support for the image format in Firefox. Cloudflare announced AVIF support in a blog post on 3 October 2020.

One of the big things AVIF does is it fixes WebP’s biggest flaws. WebP is over 10 years old, and AVIF is a major upgrade over the WebP format. These two formats are technically related: they’re both based on a video codec from the VPx family. WebP uses the old VP8 version, while AVIF is based on AV1, which is the next generation after VP10.

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. AVIF supports 10- and 12-bit color at full resolution, and high dynamic range (HDR).

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 «avifenc.exe» manually in a separate form.

More info about AVIF here

Program uses ImageMagick for pre-convert of input files and for SSIM calculation.

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

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:
2024-03-09
Ultra7z Images to AVIF Smart Converter 1.05
– Updated AVIF 1.0.4, CAVIF 1.5.5, ImageMagick 7.1.1-26, ExifTool 12.78.
– Added new file extensions for HEIF/AVIF (HEIFS, HEICS, AVCI, AVCS, AVIFS).
– Threads up to 64.

2021-10-03 – 1.04
– Updated AVIF 0.9.2, added CAVIF 1.3.1.
– Option “Convert to PNG/JPG” with metadata (exif etc).
– YUV auto mode.
– Support JXL (JPEG XL), JPE, PPM as input.
– Option “Encode using RGB instead of YCbCr color space”. Makes colors closer to lossless, but makes files larger.
– Threads up to 16.
– Added time for each images from the list.
– Added “Wait…” on the button “Start” after click on it.

2020-12-12 – 1.03
– added smart level of comression (based on SSIM)(very slow, but effective):
“Same as JPEG 85%”, “Same as WEBP 85%”, “Target SSIM = 0.97” (you can change values)

2020-12-01 – 1.01
– first release

Download Ultra7z Images to AVIF Smart Converter 1.05 (29 Mb):
Download here (28 Mb)
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The post Ultra7z Images to AVIF Smart Converter 1.05 first appeared on Super Compression - useful programs/tools and information!.

Features:
– High compression ratio (20% smaller).
– Supported formats: jpg, jpeg, jpe.
– Lossless compression.
– You can set «Run in background (without console output)» or uncheck it for manual process control.

Compression:
– Lossless JPEG transcoding: about 20% smaller.

Features:
– 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.

Compression modes:
– Add to archive.
– Extract from archive.
– Convert to PNG.

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.

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 JPEG Archiver”

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:
2022-06-26 – 1.01
– first release.

Download Ultra7z JPEG Archiver 1.01 (English) (34 Mb):
Download here (34 Mb)
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The post Ultra7z JPEG Archiver 1.01 first appeared on Super Compression - useful programs/tools and information!.

Features:
– High compression ratio.
– Supported formats: jpg, jpeg, webp, png, tiff, tif, gif, bmp, pnm.
– Option “Strip metadata (exif etc)”.
– You can set «Run in background (without console output)» or uncheck it for manual process control.
– Option for lossy compression.
– Option for lossless compression.
– Option for near-lossless compression.

Lossless WebP supports transparency (also known as alpha channel) at a cost of just 22% additional bytes. For cases when lossy RGB compression is acceptable, lossy WebP also supports transparency, typically providing 3× smaller file sizes compared to PNG.

Lossy WebP compression uses predictive coding to encode an image, the same method used by the VP8 video codec to compress keyframes in videos. Predictive coding uses the values in neighboring blocks of pixels to predict the values in a block, and then encodes only the difference.

Lossless WebP compression uses already seen image fragments in order to exactly reconstruct new pixels. It can also use a local palette if no interesting match is found.

WebP is natively supported in Google Chrome, Firefox, Edge, the Opera browser, and by many other tools and software libraries. Developers have also added support to a variety of image editing tools.

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 «cwebp.exe» manually in a separate form.

More info about WEBP here

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

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:
2022-02-25
Ultra7z Images to WebP Converter 1.02
– Update WEBP 1.2.2
– Added “Wait…” on the button “Start” after click on it.
– Added time for each file from the list.

2020-08-09
– first release

Download Ultra7z Images to WebP Converter 1.02 (3 Mb):
Download here (3 Mb)
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The post Ultra7z Images to WebP Converter 1.02 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!.