libcompress

Pure Dart implementations of LZ4, Snappy, GZIP, and Zstd compression algorithms with no native dependencies.

1.2.1 2.5K downloads/mo #4931 most downloaded on pub.dev libdbm/libcompress

What this package is like to depend on

Last release 1 months ago

26 Jun 2026

Too new to tell

only 2 release windows

Nearly every release is documented

notes for 4 of 4 stable releases

Nothing withdrawn

no release was ever pulled

7 months old

4 releases · first in 2026

4 releases in the last 12 months

see the full history below

Release timeline

4 releases · Jan 2026 to Jun 2026

Release Pre-release

Releases

latest 4

1.2.1 26 Jun 2026
Release notes
- crc32: Expose crc32.dart via the public API.
Open source →
1.2.0 24 Jun 2026
Release notes
- LZ4: Lz4Codec.compressBlock/decompressBlock expose the raw LZ4 block format (the bare LZ77 token stream, no frame header/checksum) for containers that supply their own framing.
Open source →
1.1.0 24 Jun 2026
Release notes
- Major cleanup and bug fixes.
- Better streaming and more deterministic behavior
Open source →
1.0.0 19 Jan 2026
Release notes
- Initial release with pure Dart compression implementations (no native dependencies; runs on the Dart VM and dart2js/web)
- LZ4: Full frame format support with configurable block sizes (64K, 256K, 1M, 4M) and compression levels 1-9 (HC mode); block decode accepts concatenated frames
- Snappy: Raw block format and streaming (framing) format with CRC32C checksums
- GZIP: Pure Dart DEFLATE implementation with compression levels 1-9, optional filename/comment metadata, multi-member support
- Zstd: Practical subset of RFC 8878 with FSE/Huffman entropy coding, sequence encoding, repeat offsets, and compression levels 1-22 (dictionary-compressed frames are not supported and are rejected on decode)
- Stream-based APIs for all codecs via CompressionStreamCodec, with backpressure and an optional verified (all-or-nothing) mode that withholds output until checksums validate
- Common codec interface via CompressionCodec; CodecFactory.codec/streaming accept maxDecompressedSize/maxBufferSize/verified for central limit enforcement
- Security: all decompressors enforce a configurable maxDecompressedSize (cumulative across frames/members); streaming decode is incremental and memory-bounded
- Observability: Zstd exposes a compressed-block fallback counter, onFallback hook, and opt-in strict mode
- CLI tool (libcompress) for all codecs, with atomic output (temp file + rename, cleanup on error) and an opt-in --verified flag
- CLI compatibility verified with the native lz4, gzip, snzip, and zstd tools
Open source →

libcompress

What this package is like to depend on

Release timeline

Releases

Every package, every release, already written down.