Lepton is a tool and file format for losslessly compressing JPEGs by an average of 22%.

State-of-the-art audio codec with 90x compression factor. Supports 44.1kHz, 24kHz, and 16kHz mono/stereo audio.

MEAL V2: Boosting Vanilla ResNet-50 to 80%+ Top-1 Accuracy on ImageNet without Tricks. In NeurIPS 2020 workshop.

Fast In-Memory Data Compression Algorithm (header-only C/C++) 480+MB/s compress, 2800+MB/s decompress, ratio% better than LZ4, Snappy, and Zstd@-1

Asymmetric lossless compression built for ultra-fast decode. 40%+ faster than LZ4 on ARM64, with better ratios. C library, write-once/read-many.

Building better compression together

The Minimal LZMA (minlzma) project aims to provide a minimalistic, cross-platform, highly commented, standards-compliant C library (minlzlib) for decompressing LZMA2-encapsulated compressed data in LZMA format within an XZ container, as can be generated with Python 3.6, 7-zip, and xzutils

Rust libraries and programs focused on succinct data structures

This is a compression technique that targets for LiDAR-generated point cloud

c++ library wrapper of 7zip

Weissman score calculator

Free open-source compressor for apLib with 5-7% better ratios

Specification of seek-optimized zip file profile

C++ implementations of common data compression algorithms.

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

Small fast Lempel-Ziv compression library

A C++ compression program based on Huffman's lossless compression algorithm and decoder.

A free, open-source compressor for the ZX0 format

A fileless C2 framework written in pure x64 Linux Assembly with zero libc dependencies. Features dynamic protocol pivoting between raw ICMP sockets and DNS (UDP/53) via in-memory VTable manipulation. 100% direct syscalls, no disk writes, and strict mathematical packet authentication.

Compress and encode strings into base62 [0-9a-zA-Z] using an original LZ-based algorithm in JavaScript.