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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The post Ultra FreeArc Optimizer 1.05 first appeared on Super Compression - useful programs/tools and information!.

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!.

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
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The post Ultra7z Video to AV1/H265/H264 Converter 1.04 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)
Mirror 1
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Mirror 3

The post Ultra7z Images to AVIF Smart Converter 1.05 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)
Mirror 1
Mirror 2
Mirror 3

The post Ultra7z PDF Lossless Optimizer & Compressor 1.01 first appeared on Super Compression - useful programs/tools and information!.