Zeekstd – Rust Implementation of the ZSTD Seekable Format
Hello, I would like to share a Rust implementation of the Zstandard seekable format I've been working on. Regular zstd compressed files consist of a single frame, meaning you have to start decompression at the beginning. The seekable format splits compressed data into a series of independent frames, each compressed individually, so that decompression of a section in the middle of an archive only requires zstd to decompress at most a frame's worth of extra data, instead of the entire archive. I started working with the seekable format because I wanted to resume downloads of big zstd…
Zeekstd – Rust Implementation of the ZSTD Seekable Format launched on June 15, 2025 with 214 votes, #155 of 7,999 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
Zeekstd is a Rust implementation of the Zstandard seekable format, which divides compressed data into independent frames rather than a single frame. This allows decompression to start at any point in the middle of an archive without processing the entire file from the beginning. It is designed for developers working with large compressed files, particularly those needing to resume partial downloads or access specific sections of zstd-compressed archives efficiently.
written from the facts on this page · September 2026
From the sources
Rust implementation of the Zstandard Seekable Format - rorosen/zeekstd
The seekable format splits compressed data into a series of independent frames, each compressed individually, so that decompression of a section in the middle of a compressed file only requires zstd to decompress at most a frame's worth of extra data, instead of the entire file. The format also specifies a seek table that allows seekable decoders to efficiently jump to requested data. The seek table is placed in a Zstandard Skippable Frame and can be appended to the end of a seekable compressed file or written to a standalone file. Any compliant zstd decoder can restore the original content of a seekable compressed file by decompressing it. As the seek table is placed in a skippable frame,…from github.com
In the maker’s words, at launch
Hello, I would like to share a Rust implementation of the Zstandard seekable format I've been working on. Regular zstd compressed files consist of a single frame, meaning you have to start decompression at the beginning. The seekable format splits compressed data into a series of independent frames, each compressed…
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