zarrsA Rust library for the Zarr storage format

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A high-performance Zarr V3/V2 library

Powered by Rust. Full support for Zarr V3 and a compatible subset of Zarr V2. Up-to-date with the specifications and accepted ZEPs.

Accelerated codec pipeline for Python

zarrs-python includes a drop-in high-performance codec pipeline for the zarr-python reference implementation.

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Diverse storage support

Supports filesystem, in-memory, and a huge range of object storage backends (e.g. HTTP, S3, GCP, etc.) via the object_store and opendal crates, and icechunk transactional storage.

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Draft ZEP/experimental codec support

✓ ZEP 2 - Sharding Codec
✓ ZEP 3 (Draft) - Variable Chunking
✓ ZEP 7 (Draft) - Strings
✓ bitround, zfp, pcodec, bz2, gdeflate codecs

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Tools built with `zarrs`

• zarrs_reencode reencode, convert V2->V3, ...
• zarrs_ome create OME-Zarr multiscale images
• zarrs_filter manipulate arrays (crop, blur, ...)
... and more in zarrs_tools

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Forever free and open-source

Contributions are welcome.
• zarrs (github.com)
• zarrs-python (github.com)

Announcements

: zarrs 0.22 released: new extensions, initial generic indexing/WASM support, expanded experimental partial encoding.
: zarrs 0.21 released: several bug fixes and support for a number of additional data types.
: zarrs 0.20 released: support for Zarr 3.1, ZEP0009, ZEP0010 (draft), new codecs, and extension data types.
: LDeakin/zarrs, ilan-gold/zarrs-python, and other zarrs-related repositories have moved to the zarrs GitHub organisation.
: zarrs has joined the newly refreshed Zarr Implementation Council (ZIC).