PZip.net

pzip is a lossless, format-aware compressor that delivers a never-worse-than-LZMA guarantee on any input while achieving up to 2.2× better compression on schema-regular data like CSV. It automatically routes structured formats to specialized codecs and falls back to LZMA otherwise, with byte-exact round-trip verification via sha256 checksums. The tool ships as a single C++ binary under Apache-2.0 with no telemetry.

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Developer Tools
Software Only
Artificial Intelligence

Updated 5 days ago

Funding

Funding rounds are not available yet.

Founders

Founder details are not available yet.

Product

Problem

General-purpose compressors like LZMA are format-agnostic and skip structural patterns in schema-regular data (CSV columns, JSON keys, event stream fields), leaving significant size reduction opportunities on the table. Users face a tradeoff between generic tools that are reliable but suboptimal on structured data, and bespoke format-specific compressors that are rigid and risky to adopt on real-world inputs.

Solution

pzip is a lossless, format-aware compressor that combines specialized codecs for structured data with a guaranteed LZMA fallback. It automatically routes CSV, JSON, JSONL, source code, server logs, and tensor checkpoints to dedicated codecs, while any input that doesn’t benefit gets plain LZMA output — ensuring it’s never worse than LZMA -9. The tool verifies byte-exact round-trips via sha256 checksums in the container header, refusing corrupted output at decompression time. It ships as a single C++ binary with a stripped-down CLI, no telemetry, and full Apache-2.0 source availability.

Target Audience

Primary users are developers and DevOps engineers handling large schema-regular datasets (CSV exports, JSON logs, event streams, ML checkpoints) who need maximum compression without risking compatibility or data integrity.

Features

Format-aware codecs for CSV (up to ~2.2× over LZMA), JSON, JSONL, source code, server logs, and safetensors checkpoints
Guaranteed never-worse contract: when no specialized codec beats LZMA, output is identical to LZMA -9 output
Byte-exact round-trip verification via sha256 header checksums with decompressor-side rejection of mismatched bytes
Single-file static C++20 binary with CMake-based builds and a .deb package for Debian/Ubuntu
Apache-2.0 licensed with zero telemetry, analytics, or API keys