base on 7-Zip with support for Brotli, Fast-LZMA2, Lizard, LZ4, LZ5 and Zstandard # README This is the Github Page of [7-Zip] ZS with support of additional Codecs. The library used therefore is located here: [Multithreading Library](https://github.com/mcmilk/zstdmt) You can install it in two ways: 1. complete setup with additions within the GUI and a modified Explorer context menu 2. only the codec plugin that goes to your existing [7-Zip] installation (no GUI changes and no additional Hashers) # Status [](https://github.com/mcmilk/7-Zip-zstd/releases) [](https://www.paypal.me/TinoReichardt) ## Codec overview 1. [Zstandard] v1.5.7 is a real-time compression algorithm, providing high compression ratios. It offers a very wide range of compression / speed trade-off, while being backed by a very fast decoder. - Levels: 1..22 2. [Brotli] v.1.1.0 is a generic-purpose lossless compression algorithm that compresses data using a combination of a modern variant of the LZ77 algorithm, Huffman coding and 2nd order context modeling, with a compression ratio comparable to the best currently available general-purpose compression methods. It is similar in speed with deflate but offers more dense compression. - Levels: 0..11 3. [LZ4] v1.10.0 is lossless compression algorithm, providing compression speed at 400 MB/s per core (0.16 Bytes/cycle). It features an extremely fast decoder, with speed in multiple GB/s per core (0.71 Bytes/cycle). A high compression derivative, called LZ4_HC, is available, trading customizable CPU time for compression ratio. - Levels: 1..12 4. [LZ5] v1.5 is a modification of LZ4 which was meant for a better ratio at cost of slower compression and decompression. It's superseded by [Lizard] now. - Levels: 1..15 5. [Lizard] v2.1 is an efficient compressor with fast decompression. It achieves compression ratio that is comparable to zip/zlib and zstd/brotli (at low and medium compression levels) at decompression speed of 1000 MB/s and faster. - Levels 10..19 (fastLZ4) are designed to give about 10% better decompression speed than LZ4 - Levels 20..29 (LIZv1) are designed to give better ratio than LZ4 keeping 75% decompression speed - Levels 30..39 (fastLZ4 + Huffman) adds Huffman coding to fastLZ4 - Levels 40..49 (LIZv1 + Huffman) give the best ratio, comparable to zlib and low levels of zstd/brotli, but with a faster decompression speed 6. [Fast LZMA2] v1.0.1 is a LZMA2 compression algorithm, 20% to 100% faster than normal LZMA2 at levels 5 and above, but with a slightly lower compression ratio. It uses a parallel buffered radix matchfinder and some optimizations from Zstandard. The codec uses much less additional memory per thread than standard LZMA2. - Levels: 1..9 ## 7-Zip Zstandard Edition (full setup, with GUI and Explorer integration) ### Installation (via setup) 1. download the setup from here [7-Zip ZS Releases](https://github.com/mcmilk/7-Zip-zstd/releases) 2. install it, like the default [7-Zip] 3. use it ;) 4. you may check, if the [7-Zip] can deal with [Zstandard] or other codecs via this command: `7z.exe i` The output should look like this: ``` 7-Zip 25.01 ZS v1.5.7 (x64) : Copyright (c) 1999- Igor Pavlov, 2016- Tino Reichardt, 2022- Sergey G. Brester : 2025-08-06 Libs: 0 c:\Program Files\7-Zip-Zstandard\7z.dll 1 C:\Program Files\7-Zip-Zstandard\Codecs\Iso7z.64.dll Formats: ... 0 CK xz xz txz (.tar) FD 7 z X Z 00 0 Z z taz (.tar) 1F 9D 0 CK zstd zst zstd tzst (.tar) tzstd (.tar) 0 x F D 2 F B 5 2 5 . . 0 x F D 2 F B 5 2 8 00 0 C F 7z 7z 7 z BC AF ' 1C 0 F Cab cab M S C F 00 00 00 00 ... Codecs: 0 4ED 303011B BCJ2 0 EDF 3030103 BCJ 0 EDF 3030205 PPC 0 EDF 3030401 IA64 0 EDF 3030501 ARM 0 EDF 3030701 ARMT 0 EDF 3030805 SPARC 0 EDF 20302 Swap2 0 EDF 20304 Swap4 0 ED 40202 BZip2 0 ED 0 Copy 0 ED 40109 Deflate64 0 ED 40108 Deflate 0 EDF 3 Delta 0 ED 21 LZMA2 0 ED 30101 LZMA 0 ED 30401 PPMD 0 D 40301 Rar1 0 D 40302 Rar2 0 D 40303 Rar3 0 D 40305 Rar5 0 ED 4F71102 BROTLI 0 ED 4F71104 LZ4 0 ED 4F71106 LIZARD 0 ED 4F71105 LZ5 0 ED 4F71101 ZSTD 0 ED 21 FLZMA2 0 EDF 6F10701 7zAES 0 EDF 6F00181 AES256CBC Hashers: 0 32 202 BLAKE2sp 0 32 204 BLAKE3 0 4 1 CRC32 0 8 4 CRC64 0 16 205 MD2 0 16 206 MD4 0 16 207 MD5 0 20 201 SHA1 0 32 A SHA256 0 48 208 SHA384 0 64 209 SHA512 0 32 20A SHA3-256 0 48 20B SHA3-384 0 64 20C SHA3-512 0 4 20D XXH32 0 8 20E XXH64 ``` ### Usage and features of the full installation - compression and decompression for [Brotli], [Lizard], [LZ4], [LZ5] and [Zstandard] within the [7-Zip] container format - compression and decompression of [Brotli] (`.br`), [Lizard] (`.liz`), [LZ4] (`.lz4`), [LZ5] (`.lz5`) and [Zstandard] (`.zst`) files - handling of ZIP files with [Zstandard] compression - included [lzip] decompression support, patch from: https://download.savannah.gnu.org/releases/lzip/7zip/ - explorer context menu: _"Add to xy.7z"_ will use all parameters of the last "Add to Archive" compression dialog (this includes: method, level, dictionary, blocksize, threads and paramters input box) - squashfs files with LZ4 or Zstandard compression can be handled - several history settings aren't stored by default, look [here](https://sourceforge.net/p/sevenzip/discussion/45797/thread/dc2ac53d/?limit=25) for some info about that, you can restore original 7-Zip behavior via `tools->options->settings` - these hashes can be calculated: CRC32, CRC64, MD2, MD4, MD5, SHA1, SHA256, SHA384, SHA512, SHA3-256, SHA3-384, SHA3-512, XXH32, XXH64, BLAKE2sp, BLAKE3 (lowercase or uppercase) ``` 7z a archiv.7z -m0=zstd -mx0 Zstandard Fastest Mode, without BCJ preprocessor 7z a archiv.7z -m0=zstd -mx1 Zstandard Fast mode, with BCJ preprocessor on executables 7z a archiv.7z -m0=zstd -mx.. ... 7z a archiv.7z -m0=zstd -mx21 Zstandard 2nd Slowest Mode, with BCJ preprocessor on executables 7z a archiv.7z -m0=zstd -mx22 Zstandard Ultra Mode, with BCJ preprocessor on executables 7z a archiv.7z -m0=lz4 -mx0 LZ4 Fastest Mode, without BCJ preprocessor 7z a archiv.7z -m0=lz4 -mx1 LZ4 Fast mode, with BCJ preprocessor on executables 7z a archiv.7z -m0=lz4 -mx.. ... 7z a archiv.7z -m0=lz4 -mx12 LZ4 Ultra Mode, with BCJ preprocessor on executables 7z a archiv.7z -m0=lz5 -mx0 LZ5 Version 1.5 Fastest Mode, without BCJ preprocessor 7z a archiv.7z -m0=lz5 -mx1 LZ5 Version 1.5 Fast mode, with BCJ preprocessor on executables 7z a archiv.7z -m0=lz5 -mx.. ... 7z a archiv.7z -m0=lz5 -mx16 LZ5 Version 1.5 Ultra Mode, with BCJ preprocessor on executables 7z a archiv.7z -m0=flzma2 -mx1 Fast LZMA2 Fastest mode, with BCJ preprocessor on executables 7z a archiv.7z -m0=flzma2 -mx.. ... 7z a archiv.7z -m0=flzma2 -mx9 Fast LZMA2 Ultra Mode, with BCJ preprocessor on executables 7z x -so test.tar.zst | 7z l -si -ttar -> show contents of zstd compressed tar archive test.tar.zst 7z x -so test.tar.lz | 7z l -si -ttar -> show contents of lzip compressed tar archive test.tar.lz ```      ## Zstandard codec Plugin for Mainline 7-Zip ### Installation (via plugin) 1. download the `Codecs.7z` archive from here [7-Zip ZS Releases](https://github.com/mcmilk/7-Zip-zstd/releases), this archive holds binaries, which are compatible with the Mainline version of [7-Zip] 2. create a new directory named `Codecs` and put in there the zstd-x32.dll or the zstd-x64.dll, depending on your [7-Zip] installation - normally, the x32 should go to: "C:\Program Files (x86)\7-Zip\Codecs" - the x64 version should go in here: "C:\Program Files\7-Zip\Codecs" 3. you could also replace the `7z.dll` directly within `C:\Program Files (x86)\7-Zip` 4. then you may check if the dll is correctly installed via this command: `7z.exe i` The output should look like this: ``` 7-Zip 21.03 (x64) : Copyright (c) 1999-2021 Igor Pavlov : 2021-05-06 Libs: 0 C:\Program Files\7-Zip\7z.dll Libs: 0 c:\Program Files\7-Zip\7z.dll 1 c:\Program Files\7-Zip\Codecs\brotli-x64.dll 2 c:\Program Files\7-Zip\Codecs\flzma2-x64.dll 3 c:\Program Files\7-Zip\Codecs\lizard-x64.dll 4 c:\Program Files\7-Zip\Codecs\lz4-x64.dll 5 c:\Program Files\7-Zip\Codecs\lz5-x64.dll 6 c:\Program Files\7-Zip\Codecs\zstd-x64.dll ... Codecs: 0 4ED 303011B BCJ2 0 ED 3030103 BCJ 0 ED 3030205 PPC 0 ED 3030401 IA64 0 ED 3030501 ARM 0 ED 3030701 ARMT 0 ED 3030805 SPARC 0 ED 20302 Swap2 0 ED 20304 Swap4 0 ED 40202 BZip2 0 ED 0 Copy 0 ED 40109 Deflate64 0 ED 40108 Deflate 0 ED 3 Delta 0 ED 21 LZMA2 0 ED 30101 LZMA 0 ED 30401 PPMD 0 D 40301 Rar1 0 D 40302 Rar2 0 D 40303 Rar3 0 D 40305 Rar5 0 ED 6F10701 7zAES 0 ED 6F00181 AES256CBC 1 ED 4F71102 BROTLI 2 ED 21 FLZMA2 3 ED 4F71106 LIZARD 4 ED 4F71104 LZ4 5 ED 4F71105 LZ5 6 ED 4F71101 ZSTD ``` ### Usage (codec plugin) - compression and decompression for [Brotli], [Fast LZMA2], [Lizard], [LZ4], [LZ5] and [Zstandard] within the 7-Zip container format - you can only create `.7z` files, the files like `.lz4`, `.lz5` and `.zst` are not covered by the plugins - when compressing binaries (*.exe, *.dll), you have to explicitly disable the bcj2 filter via `-m0=bcj`, when using only the plugin dll's - so the usage should look like this: ``` 7z a archiv.7z -m0=bcj -m1=zstd -mx1 Fast mode, with BCJ preprocessor on executables 7z a archiv.7z -m0=bcj -m1=zstd -mx.. ... 7z a archiv.7z -m0=bcj -m1=zstd -mx21 2nd Slowest Mode, with BCJ preprocessor on executables 7z a archiv.7z -m0=bcj -m1=zstd -mx22 Ultra Mode, with BCJ preprocessor on executables 7z a archiv.7z -m0=bcj -m1=brotli -mxN ... 7z a archiv.7z -m0=bcj -m1=lizard -mxN ... 7z a archiv.7z -m0=bcj -m1=lz4 -mxN ... 7z a archiv.7z -m0=bcj -m1=lz5 -mxN ... 7z a archiv.7z -m0=bcj -m1=flzma2 -mxN ... ``` ## Codec Plugin for Total Commander - download [TotalCmd.7z] - install it, by replacing the files `tc7z.dll` and `tc7z64.dll` with the new ones - you can check the Total Commander Forum for more information about this [DLL Files](https://ghisler.ch/board/viewtopic.php?p=319216) - decompression for [Brotli], [Lizard], [LZ4], [LZ5] and [Zstandard] ot the 7-Zip `.7z` format will work out of the box with Total Commander now :-) ## Codec Plugin for Far Manager - copy the `7z.dll` file from `C:\Program Files\7-Zip-Zstandard\7z.dll` to `C:\Program Files\Far Manager\Plugins\ArcLite\7z.dll` - then restart the Far manager - and on next start, you will have support for 7-Zip Zstandard archives ;-) ## Benchmarks For the benchmarks I am using Windows 7 64bit on my Laptop which has the following Hardware: - Intel i7-3632QM, limited to 2,2GHz, 16GB RAM, disabled swap space - the compression benchmark is read / written to an 4 GiB [ImDisk] - the decompression benchmark is also done in RAM via: `7z t archiv.7z` - the tool for measuring the times is [wtime](https://github.com/mcmilk/wtime), together with some [scripts](https://github.com/mcmilk/7-Zip-Benchmarking) - the testfile is generated via [generate-mcorpus](https://github.com/mcmilk/7-Zip-Benchmarking/blob/master/generate-mcorpus) - please note, that the benchmarks are outdated now (new one will come, but it needs some time)     ## Themes - FileManager Toolbar Icon Theme: Glyfz 2016 by AlexGal [homepage](https://www.deviantart.com/alexgal23) - File Types Icon Theme: Windows 10 by masamunecyrus [homepage](https://www.deviantart.com/masamunecyrus) - Additional icons file types created by Mr4Mike4 [homepage](https://github.com/Mr4Mike4) ## License and Redistribution - The same as the Mainline [7-Zip], which means most of the code is GNU LGPL v2.1-or-later - Read [COPYING](COPYING) for more details ## Links - [7-Zip Homepage](https://www.7-zip.org/) - [7-Zip Zstandard Homepage](https://mcmilk.de/projects/7-Zip-zstd/) - [Request for inclusion](https://sourceforge.net/p/sevenzip/discussion/45797/thread/a7e4f3f3/) into the mainline 7-Zip: - result, will currently not included :( - [p7zip Homepage](https://github.com/jinfeihan57/p7zip) - for Linux and MacOS with LZ4 and Zstandard ## Donate You find this project useful, maybe you consider a donation ;-) [](https://www.paypal.me/TinoReichardt) ## Version Information - 7-Zip ZS Version 25.01 - [Brotli] Version 1.1.0 - [Fast LZMA2] Version 1.0.1 - [Lizard] Version 2.1 - [LZ4] Version 1.10.0 - [LZ5] Version 1.5 - [Zstandard] Version 1.5.7 /TR 2025-08-06 ## Notes - if you want an code signed installer, you need to donate sth. [7-Zip]:https://www.7-zip.org/ [lzip]:https://www.nongnu.org/lzip/ [Brotli]:https://github.com/google/brotli/ [BLAKE3]:https://github.com/BLAKE3-team/BLAKE3 [LZ4]:https://github.com/lz4/lz4/ [LZ5]:https://github.com/inikep/lz5/ [Zstandard]:https://github.com/facebook/zstd/ [Lizard]:https://github.com/inikep/lizard/ [ImDisk]:https://sourceforge.net/projects/imdisk-toolkit/ [Fast LZMA2]:https://github.com/conor42/fast-lzma2 [Codecs.7z]:https://github.com/mcmilk/7-Zip-zstd/releases [TotalCmd.7z]:https://github.com/mcmilk/7-Zip-zstd/releases ", Assign "at most 3 tags" to the expected json: {"id":"14212","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"