Top COMPRESSION GitHub Repositories & Tools (2026)

Compress tool outputs, logs, files, and RAG chunks before they reach the LLM. 20% fewer tokens for coding agents, 60-95% fewer tokens for JSON, same answers. Library, proxy, MCP server.

The Cyber Swiss Army Knife - a web app for encryption, encoding, compression and data analysis

An extensible, state-of-the-art framework for columnar compression, and the fastest FOSS columnar file format. Formerly at @spiraldb, now an Incubation Stage project at LFAI&Data, part of the Linux Foundation.

Glyd - Fast lossless compression algorithm

Menu Bar App on MacOS and Windows that cuts Claude Code and Codex token costs by ~50%

Dinky makes files smaller.

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

Fast, memory-safe Rust zstd codec with all-level decode, -8..4 encode, and dictionary training.

Some LZ77 compression utilities for the handy hands-on developer in search for a few less bytes of I/O.

Archive manager and 7zip replacement for macOS. Preview (nested) archives without extracting them. Extract single files.