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

Seekable lossless compression with O(1) random access, built for ultra-fast decode. Faster than LZ4 (40%+ on ARM64), with better ratios. C library, write-once/read-many.

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

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

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.

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/

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.

A tool to generate optimized hardware files for univariate functions.

A lossless token-optimization codec for LLM agents — cut input tokens up to 82%, nothing dropped, every fact kept. Drop-in proxy + one-line Python API for Claude Code, Codex, Cursor, OpenAI, Anthropic & Ollama. pip install foveance

Lossless-first prompt compression for JSON, YAML, CSV, and Markdown. Library, CLI, MCP server, desktop app, and browser extension.

Local, provider-neutral compression for LLM prompts, tool schemas, JSON, logs, and diffs. Lossless, receipt-audited, no ML tax.

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.

A tool to generate optimized hardware files for univariate functions.

JPEG-LS encoder for FPGA. Verified. 240MHz on UltraScale+

A kompakt macOS app to compress images and videos instantly.

C99 header-only small (300 LOC) adaptive entropy encoding library

Really High Efficient File Optimizer will losslessly recompress files as much as possible according to their mime-types

KeSSie HUGE Context Semantic recall for Large Language Models