Open Source Windows File Compression Software
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File Compression Software for Windows
View 31 business solutionsBrowse free open source File Compression software and projects for Windows below. Use the toggles on the left to filter open source File Compression software by OS, license, language, programming language, and project status.
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Info-ZIP project
Info-ZIP portable compression/archiver utilities
Info-ZIP portable compression/archiver utilities (Zip, UnZip, WiZ, etc.) -
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7-Zip
A free file archiver for extremely high compression
7-Zip is a file archiver with a high compression ratio. 7-Zip works in Windows 11 / 10 / 8 / 7 / Vista / XP / 2022 / 2019 / 2016 / 2012 / 2008 / 2003 / 2000. You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. And there is command line version for Linux and macOS. Most of the source code is under the GNU LGPL license. The unRAR code is under a mixed license with GNU LGPL + unRAR restrictions. Check the license for details. -
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LAME (Lame Aint an MP3 Encoder)
A high quality MP3 encoder
LAME is an educational tool to be used for learning about MP3 encoding. The goal of the LAME project is to improve the psycho acoustics, quality and speed of MP3 encoding. Note: we provide source code only! -
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PeaZip
Free Zip software and Rar extractor
PeaZip is a free archiver tool. The application provides an unified, natively portable, cross-platform file manager and archive manager GUI for many Open Source technologies like 7-Zip, FreeArc, PAQ, UPX. Create: 7Z, ARC, Brotl, BZip, GZip, PEA, TAR, WIM, XZ, ZPAQ, ZIP, Zstandard files and more Open and extract 200+ file types: ACE, CAB, DEB, ISO, RAR, ZIPX and more Features of PeaZip includes extract, create and convert multiple archives at once, create self-extracting archives (sfx), split files, strong encryption with two factor authentication, encrypted password manager, secure deletion, find duplicate files, calculate hashes, export task definition as command line script. -
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LZ4
Extremely fast compression algorithm
LZ4 is lossless compression algorithm, providing compression speed > 500 MB/s per core (>0.15 Bytes/cycle). It features an extremely fast decoder, with speed in multiple GB/s per core (~1 Byte/cycle). A high compression derivative, called LZ4_HC, is available, trading customizable CPU time for compression ratio. LZ4 library is provided as open-source software using a BSD license. This benchmark simulates simple "static content transfer" scenario such as OS Kernel compression or video game's static assets (text/images/tables/scripts/etc) which loading from Flash Memory / HDD / SSD. In this case, compression time is completely ignored. Because only content developers compress the data at once and usually they don't care about its computational cost. But they always care end user's experience a.k.a. "loading time" and bandwidth. Please pay attention to "LZ4HC -9" which is quite faster than other methods. -
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NanaZip
The 7-Zip derivative intended for the modern Windows experience
NanaZip is an open source file archiver intended for the modern Windows experience, forked from the source code of well-known open source file archiver 7-Zip. Source code is hosted at https://github.com/M2Team/NanaZip. -
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OptiPNG
Advanced PNG optimization program
OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. This program also converts external formats (BMP, GIF, PNM and TIFF) to optimized PNG, and performs PNG integrity checks and corrections. -
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zpaqfranz
Zpaq compatible archiver for Win, Linux, Free/OpenBSD, Solaris & MacOS
High-Performance Archiver & Backup for Mission-Critical Data Bulletproof archival for multi-TB datasets, NAS, and VM backups Built for speed: multi-core CPUs and modern SSD/NVMe drives to achieve 1 GB/s+ throughput, up to 3x faster than 7-Zip Far more efficient and versatile than Time Machine or ZFS snapshots Key Features: ✓ Deduplicated, incremental & versioned backups ✓ Anti-ransomware integrity checks & deep validation ✓ Multi-hash support: SHA-2, SHA-3, BLAKE3, XXH3 & more ✓ Strong encryption & low bandwidth overhead for Cloud/NAS/USB ✓ Full deduplicated disk imaging ✓ Read-only Archive Mounting in filesystem ✓ Includes GUI (Win/Linux/Mac): sourceforge.net/projects/catpaq Cross-Platform & Lightweight: Runs on Windows (inc. XP), Linux, macOS, FreeBSD, OpenBSD, TrueNAS, Synology, QNAP, ARM, and ESXi. 15+ years of active development • 100% FOSS • Forever Free github.com/fcorbelli/zpaqfranz www.francocorbelli.it/zpaqfranz -
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Nikkho
Javier Gutiérrez Chamorro (Guti) Open source projects
Javier Gutiérrez Chamorro (Guti) Open source projects Author's website: https://www.javiergutierrezchamorro.com -
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Zstandard
Zstandard - Fast real-time compression algorithm
Zstandard is a fast compression algorithm, providing high compression ratios. It also offers a special mode for small data, called dictionary compression. The reference library offers a very wide range of speed / compression trade-off, and is backed by an extremely fast decoder (see benchmarks below). Zstandard library is provided as open source software using a BSD license. Its format is stable and published as IETF RFC 8478. The negative compression levels, specified with --fast=#, offer faster compression and decompression speed in exchange for some loss in compression ratio compared to level 1, as seen in the table above. Zstd can trade compression speed for stronger compression ratios. It is configurable by small increment. Decompression speed is preserved and remain roughly the same at all settings, a property shared by most LZ compression algorithms, such as zlib or lzma. -
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FLAC is a free lossless compressed audio format which supports streaming and archival. The FLAC project maintains the format and provides a reference encoder/decoder and input plugins for several popular audio players.
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WinRAR
Compress, Encrypt, Package and Backup with only one utility
WinRAR is a powerful file archiver and compression tool that supports multiple file formats, including RAR and ZIP. It is widely used for compressing large files into smaller, more manageable sizes and decompressing files into their original format. WinRAR offers advanced features for both personal and professional use, such as file encryption, password protection, and splitting large files into smaller parts for easier storage or transfer. Its intuitive interface makes it easy for users to compress, encrypt, and share files quickly and efficiently. -
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FreeArc combines best 7-zip and RAR features: auto-selected LZMA/PPMD/Multimedia compression, 1gb dictionary, exe/dict/delta data filters, updatable solid archives, SFXes, recovery record, AES+Twofish+Serpent encryption, Linux support and much more...
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Brotli
Brotli compression format
Version 1.0.9 contains a fix to "integer overflow" problem. This happens when "one-shot" decoding API is used (or input chunk for streaming API is not limited), input size (chunk size) is larger than 2GiB, and input contains uncompressed blocks. After the overflow happens, memcpy is invoked with a gigantic num value, that will likely cause the crash. Brotli 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. The specification of the Brotli Compressed Data Format is defined in RFC 7932. Brotli is open-sourced under the MIT License. You can download and install brotli using the vcpkg dependency manager. -
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Dinky
Dinky makes files smaller
Dinky is a lightweight developer tool designed to simplify interactions with large language models by providing a streamlined interface for prompt execution and experimentation. It focuses on usability, offering a minimal environment where developers can quickly test prompts, iterate on outputs, and refine workflows without complex setup. The project is built with simplicity in mind, making it easy to integrate into existing development processes or use as a standalone experimentation tool. It supports flexible configuration, allowing users to connect to different model providers and adjust parameters as needed. Dinky also emphasizes speed, enabling rapid iteration cycles that are essential for prompt engineering and prototyping. Its design avoids unnecessary complexity while still providing enough functionality for practical use. Overall, Dinky serves as a compact and efficient tool for exploring and testing AI-driven interactions. -
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Lossless compressor for multichannel 8,16 and 24 bits audio data, with the ability of password data protection. Being 'lossless' means that no data/quality is lost in the compression - when uncompressed, the data will be identical to the original.
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KGB Archiver is the compression tool with unbelievable high compression rate. It surpasses even such efficient compression tool like 7zip and UHARC in terms of the abilities. KGB Archiver uses AES-256 encryption to encrypt archives.
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Bandizip
Fast & efficient file compression and archiving tool
Bandizip is a fast and efficient file compression and archiving tool designed for Windows users, providing an intuitive interface and a wide array of compression formats. It supports popular archive formats like ZIP, RAR, 7Z, and more, allowing users to create, extract, and manage compressed files with ease. Bandizip is renowned for its high-speed processing and multi-core compression, making it a go-to option for handling large files or batches of files efficiently. It also includes encryption features to secure sensitive files and advanced settings for controlling the compression ratio. With its lightweight design and broad compatibility, Bandizip is an excellent choice for both casual users and professionals seeking a reliable and versatile compression tool. -
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FLAC Frontend
The new, updated front-end for FLAC!
As Speek's celebrated FLAC Frontend hasn't been updated for 10 years, things started to get a little buggy with new Windows versions. This remake fixes most issues. FLAC Frontend is a convenient way for Windows users not used to working with command lines to use the official FLAC tools. It accepts WAVE, W64, AIFF and RAW files for encoding and outputs FLAC or OGG-FLAC files. It is able to decode FLAC files, test them, fingerprint them and re-encode them. It has drag-and-drop support too. -
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pngcrush and other tools for manipulating PNG (Portable Network Graphics) and MNG (Multiple-image Network Graphics) files.
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UglifyJS 3
JavaScript parser, mangler, compressor, beautifier toolkit
UglifyJS is a JavaScript compressor/minifier written in JavaScript. It also contains tools that allow one to automate working with JavaScript code. A parser which produces an abstract syntax tree (AST) from JavaScript code. A code generator which outputs JavaScript code from an AST, also providing the option to get a source map. A compressor (optimizer). it uses the transformer API to optimize an AST into a smaller one. A mangler, reduce names of local variables to (usually) single-letters. A scope analyzer, which is a tool that augments the AST with information about where variables are defined/referenced etc. A tree walker, a simple API allowing you to do something on every node in the AST. A tree transformer, another API intended to transform the tree. All the above utilities and APIs are defined in ~6500 lines of code (except for the effective generation of the source-map, which is handled by the source-map module). Compared to alternatives, UglifyJS is pretty small. -
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Areca-Backup is a file backup software that supports incremental, image and delta backup on local drives or FTP servers. Areca-Backup also allows you to browse your backups and navigate among different version of the files contained in your archives.
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dpaehl
Converts files between many different archive formats
* This convertor can convert the following archives: * 7-ZIP/ LZH / CAB / ZIP / ARJ / ACE / RAR / TAR / TGZ / GZ / Z / BZ2 / YZ1 / YZ2 / GCA / BEL / RPM / DEB/ BH / Noa32 / HKI / PAQAR / SQX /HA /ZOO /UHARC /LFB / ZLIB / UCL / IMP / RS / SPL / APK / Arc -
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Compressor.js
JavaScript image compressor
Compressor.js is a lightweight JavaScript library for in-browser image compression that allows developers to reduce file sizes before uploading images to a server, improving performance and user experience. It works by taking an input image (such as from a file input) and resizing or reencoding it on the client side according to developer-specified options like maximum width, height, quality, and MIME type. Because compression happens in the browser, users upload smaller images without sacrificing responsiveness or relying on server resources, which is especially useful for mobile users or limited-bandwidth environments. The library supports modern browsers and automatically handles orientation based on EXIF metadata, ensuring images appear correctly after compression.