lossless-compression

Fast In-Memory Data Compression Algorithm (header-only C/C++) 540+MB/s compress, 3000+MB/s decompress, ratio% better than LZ4, Snappy, and Zstd@--1

Lossless compression C library built for ultra-fast decode. Faster than LZ4 (+30% to 90%+; best on ARM64), at a better ratio. Official Rust, Python, Node.js, Go and WASM bindings. Write-once/read-many, with optional seekable archives for O(1) random access.

Lossless AI compression: 33% less GPU memory, bit for bit.

🗜️ Library and application for lossless, format-preserving, two-pass optimization and repair of Vorbis data, reducing its size without altering any audio information.

Private, provider-neutral context compression for LLMs. Reversibly compress schemas and logs inside your perimeter with zero third-party calls.

tiny dependency-free lossless compressor for BC/DXT texture streams (C99, ~1000 LoC)

Shrink PNG and JPEG images losslessly. Available for any Linux distribution on Flathub and the Snap Store.

TinyZZZ includes GZIP, LZ4, ZSTD, LZMA compression algorithms written in C language, unlike the official code, this code mainly focuses on simplicity and easy to understand.

fc is a research-grade, lossless floating point compressor.

A kompakt macOS app to compress images and videos instantly.

Losslessly compress the tool output your AI agent sends the model, prove every value survived, and report the exact tokens removed. Run it as a proxy, a library, or middleware.

An online .txt file compressor, de-compressor tool which uses Huffman Coding for Lossless data compression.

NZ1 - NanoZip 1: ultra-fast, dependency-free, portable C compression library optimized for embedded and high-performance use. Full docs: https://ferki-git-creator.github.io/nz1-site/

An adversarial neural network that restores the high fidelity audio lost during lossy compression

🗜 TCOBS combines lossless compression and zero-byte-free packet framing in a single pass, optimized for short binary messages on resource-constrained embedded systems.

A tool to generate optimized hardware files for univariate functions.

TRACE: Transformer-based general-purpose lossless compression (WWW 2022). Research code, dataset link and compression example.

Error Code Modeler: lossless compression for raw CD images (BIN, CDI, NRG, CCD) by stripping redundant ECC/EDC sector data. Modern C23 rewrite with streaming stdin/stdout, CUE sheet generation, and Linux/macOS/Windows builds.

Multi-language implementations of CCSDS 124.0-B-1 in C, C++, Python, Go, Rust, and Java. The lossless compression standard for fixed-length spacecraft housekeeping telemetry, based on ESA's patented POCKET+ algorithm and built from low-level OR/XOR/AND operations to run on low-power spacecraft processors under tight real-time constraints.

JPEG XL toolkit for photographers. Full ICC profile and 16-bit depth preservation — lossless or lossy. TIFF↔JXL, JPEG↔JXL, JXL→JXL recompression, JXL→PNG with EXIF/XMP. Multiple folder modes for Capture One and Lightroom.