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zarrs

Library Featured

A library for the Zarr storage format for multidimensional arrays and metadata

Checked · Sources

Downloads
75,052
Dependents
51
Stars
285
Forks
41
Contributors
20
Commits
2,081
Latest release
0.23.14 ·

About

From the project README ·

zarrs is a Rust library for the Zarr storage format for multidimensional arrays and metadata.

[!TIP] If you are a Python user, check out zarrs-python. It includes a high-performance codec pipeline for the reference zarr-python implementation.

zarrs supports Zarr V3 and a V3 compatible subset of Zarr V2. It is fully up-to-date and conformant with the Zarr 3.1 specification with support for:

  • all core extensions (data types, codecs, chunk grids, chunk key encodings, storage transformers),
  • all accepted Zarr Enhancement Proposals (ZEPs) and several draft ZEPs:
    • ZEP 0003: Variable chunking
    • ZEP 0007: Strings
    • ZEP 0009: Zarr Extension Naming
  • various registered extensions from zarr-extensions,
  • experimental extensions intended for future registration, and
  • user-defined custom extensions and stores.

A changelog can be found here. Correctness issues with past versions are detailed here.

Developed at the Department of Materials Physics, Australian National University, Canberra, Australia.

Read the full README

Getting Started

  • Read the documentation (docs.rs), which details:
    • Zarr version support,
    • array extension support (codecs, data types, chunk grids, etc.),
    • storage support,
    • examples of how to use zarrs, and
    • an overview of the zarrs ecosystem including supporting crates and Python and C/C++ bindings.
  • Read The zarrs Book.
  • Review benchmarks of zarrs and zarrs-python compared to zarr-python and tensorstore.
  • Try the command line tools in zarrs_tools:
    • zarrs_reencode: a reencoder that can change codecs, chunk shape, convert Zarr V2 to V3, etc.
    • zarrs_ome: create an OME-Zarr hierarchy from a Zarr array.
    • zarrs_filter: transform arrays: crop, rescale, downsample, gradient magnitude, gaussian, noise filtering, etc.

Licence

zarrs is licensed under either of

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

Compatibility

How each fact is measured

Runs on
GPU support unknown
What shows it
  • no dependency or feature matches a backend row
Native code
Optional
  • Binds native code: blosc-src (feature blosc), gdeflate-sys (feature gdeflate), zfp-sys (feature zfp), zstd-sys (feature zstd)
Python bindings
No Python binding crate found
License
Apache-2.0 OR MIT

Compare with similar projects

Order: strongest tier first, then most downloads, then name, with unmeasured values last. A library counts downloads over 30 days. An app counts binary downloads per release. An app with none counts its crate downloads over 30 days. ML Rust runs this catalogue, so its closest project always gets a row.

ProjectDownloadsDependentsStarsLatest releaseRuns on (GPU)Native codeLicense
zarrs This page Featured

A library for the Zarr storage format for multidimensional arrays and metadata

 51 285 0.23.14 Apache-2.0 OR MIT
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hdf5-rust Featured

Thread-safe Rust bindings for the HDF5 library.

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vortex Listed

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elusion Listed

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Python bindings

 Not applicable 0 0.2.1 Apache-2.0

Compare these

All projects in Datasets and model formats

Why FeaturedIt passes every Featured gate.

What it meets

  • It has 37 active dependents and 33 new dependents in 365 days. Featured needs 11 active dependents or 9 new dependents in 365 days.
  • Active dependents are at 100% of their peak. Featured needs at least 50%.
  • Docs are present. The release commit or a manifest ties the crate to the repository.
  • No vulnerability advisory stays unpatched past the grace window. At least one version is neither a prerelease nor 0.0.x.
  • The last activity is on 8 Nov 2026, 1 day ago. The rules expect an update within 1800 days. Dormancy rule

What else the check found

Exact rules: Featured library. The check on applied thresholds version 9.

Every rule outcome, as the check records it
  • expected-interval: version 0.23.14 base 450, doubled for 75052 downloads per month, doubled for 37 active users: E = 1800 days
  • dormancy: last activity 2026-11-08, 1 days ago, E = 1800: active
  • rot: deprecated requirement `paste (RUSTSEC-2024-0436, https://rustsec.org/advisories/RUSTSEC-2024-0436.html)`
  • featured: featured: active_users 37, new_adopters 33, former_glory 1

Measurements and sources

Each signal row shows the raw value, its source and the fetch date. The Sources list gathers every distinct source on this page. Movement needs more history.

Sources6 sources
Adoption37 active dependents, 33 new dependents in 365 days1 not measured
SignalValueSourceFetchedCounts
Active dependents37crates.io database dumpYes
New dependents (365 days)33crates.io database dumpYes
Peak active dependents37crates.io database dumpYes
Active dependents as a share of the peak1crates.io database dumpYes
Binary downloads per releaseNot measuredYes
MaintenanceLatest human commit: 1 day ago3 not measured
SignalValueSourceFetchedCounts
Latest human commit2026-11-08GitHub repositoryYes
Latest release2026-08-14crates.io database dumpYes
First release2023-09-25crates.io database dumpYes
Latest version0.23.14crates.io database dumpYes
Days the oldest outside issue waits for a reply98GitHub repositoryYes
Maintainer replies over 365 days32GitHub repositoryYes
Repository archivedfalseGitHub repositoryYes
Repository gonefalseGitHub repositoryYes
Release commit or manifest in the repotruecrates.io packageYes
Published docstruecrates.io database dumpYes
Latest release fails cargo checkNot measuredYes
Build check dateNot measuredYes
Build check toolchainNot measuredYes
SecurityUnpatched vulnerabilities: none
SignalValueSourceFetchedCounts
Unpatched vulnerabilities past the grace windownoneRustSec advisory databaseYes
RustSec unmaintained advisorynoneRustSec advisory databaseYes
Deprecation noticenonecrates.io database dumpYes
Deprecated requirementpaste (RUSTSEC-2024-0436, https://rustsec.org/advisories/RUSTSEC-2024-0436.html)crates.io database dumpYes
Distribution94 releases, 75,052 downloads over 30 days5 not measured
SignalValueSourceFetchedCounts
Releases94crates.io database dumpYes
Downloads over 30 days75052crates.io database dumpYes
Binary downloads over the last 3 releasesNot measuredYes
Homebrew installs on request over 365 daysNot measuredYes
Repology repository familiesNot measuredYes
Docker pull growth over 90 daysNot measuredYes
Docker pulls at the growth baselineNot measuredYes
Every version a prereleasefalsecrates.io database dumpYes
Every version 0.0.xfalsecrates.io database dumpYes
Every version yankedfalsecrates.io database dumpYes
Crate deleted from crates.iofalsecrates.io database dumpYes
Repository285 stars, 41 forks, 20 contributors, 2,081 commits. Stars alone never qualify a project.
SignalValueSourceFetchedCounts
GitHub stars285GitHub repositoryYes — one part of the repository route
GitHub forks41GitHub repositoryYes — one part of the repository route
Contributors with a GitHub account20GitHub contributorsYes — one part of the repository route
Commits on the default branch2081GitHub repositoryNo
Repository's main crate left out of the entrynonecrates.io database dumpYes
Facts that never count
SignalValueSourceFetchedCounts
LicenseApache-2.0 OR MITcrates.io database dumpNo
Runs on, from listed crates and their direct dependenciesGPU support unknowncrates.io database dumpNo
What shows each backendno dependency or feature matches a backend rowcrates.io database dumpNo
Native code, from listed crates and their dependenciesBinds native code: blosc-src (feature blosc), gdeflate-sys (feature gdeflate), zfp-sys (feature zfp), zstd-sys (feature zstd)crates.io database dumpNo
Python bindings, from direct dependencies of listed cratesNo Python binding crate foundcrates.io database dumpNo
Crates that depend on a listed crate directly51crates.io database dumpNo

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Judgments

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