Data Resources#

Looking for test data? IDR Samples aims at covering the different corners of the specification.

After this quick reference, you can find a diverse set of data resources in OME-Zarr format, illustrating the range of scientific stories enabled by the format.

Do you have a data resource in OME-Zarr format that you would like to share? Is there something missing? Please submit an issue or pull request to update this list.

Sample data#

Resources curating OME-Zarr sample data, for demonstration and testing purposes.

Name

Link

Description

IDR Samples

IDR Samples logo

A comprehensive set of OME-Zarr samples from IDR, covering all OME-Zarr versions

BIA Samples

BIA Samples logo

Sample OME-Zarr datasets from the BioImage Archive for testing

Sanger Institute Samples

Sanger Institute Samples logo

Datasets from the Sanger Institute that have been converted to OME-Zarr to test and encourage the file format

SSBD samples

SSBD samples logo

Sample OME-Zarr datasets from the Systems Science of Biological Dynamics database (SSBD) for testing and demonstration purposes

OME 2024 NGFF challenge

OME 2024 NGFF challenge logo

Close to 500 TB of data in the OME-Zarr 0.5 format

Data portals#

Imaging data portals with curated OME-Zarr data, including public repositories. The content in the repositories may grow with time as new datasets become available.

Name

Link

Description

CryoET Data Portal

CryoET Data Portal logo

Cryo-electron tomography (cryoET) data repository

BioFile Finder

BioFile Finder logo

A platform from the Allen Institute for Cell Science to browse lists of files, with first-class OME-Zarr support

JAX OMERO

JAX OMERO logo

The Jackson Laboratory public OMERO instance, links to OME-Zarr files are available in the key-value

webknossos Zarr Gallery

webknossos Zarr Gallery logo

A collection of mostly Electron Microscopy OME-Zarr datasets from webKnossos, a platform for large-scale 3D image data visualization and analysis.

IDR Studies

IDR Studies logo

A collection of OME-Zarr datasets from the Image Data Resource (IDR), a public repository for bioimaging data

Atlases#

These are “atlas”-like datasets, which provide a comprehensive view of a particular biological system. The metadata-rich, streaming-friendly nature of OME-Zarr makes it ideal for sharing and visualizing large, complex datasets that are often associated with atlases.

The WebAtlas pipeline (Li et al, 2024) demonstrates how OME-Zarr can be used in the context of deploying such atlases in the context of spatial transcriptomics. The examples, however, cover also other types of data, including volumetric electron microscopy, expansion microscopy and light sheet imaging.

Name

Link

Description

Publication

Sample

Zebrahub

Zebrahub logo

Multimodal atlas of zebrafish development including light-sheet imaging

Lange et al., 2024

zebrahub

ExÂME: Expansion Microscopy Atlas of Microbial Eukayotes

ExÂME logo

An atlas of expansion microscopy images of microbial eukaryotes, including OME-Zarr datasets (see also S-BIAD2095; highlight)

Mikus et al., 2024

vizarr

The Human Organ Atlas

The Human Organ Atlas logo

Atlas of organs using Hierarchical Phase-Contrast Tomography (HiP-CT)

Walsh et al., 2026

Human Organ Atlas

The Genetic Tools Atlas

The Genetic Tools Atlas logo

A searchable web tool representing information and data on enhancer-adeno-associated viruses (enhancer AAVs) and mouse transgenes

Ben-Simon et al., 2025

atlas

Platynereis cell atlas

Platynereis cell atlas logo

An expression atlas registered to a whole-body electron microscopy volume of the nereid Platynereis dumerilii

Vergara et al., 2021

neuroglancer

OpenOrganelle

OpenOrganelle logo

An open-access volume electron microscopy atlas of whole cells and tissues

Xu et al., 2021

neuroglancer

Challenges#

Some programming/machine learning challenges curate OME-Zarr datasets for testing and benchmarking purposes. Besides the data, they often bring together a community and may be useful to find other resources, such as code, tutorials, and workflows.

Name

Link

Description

CryoET Object Identification Challenge

CryoET Object Identification Challenge logo

A challenge to identify objects in cryo-electron tomography (cryoET) data, with datasets available in OME-Zarr format.

Biohub - Cell Tracking During Development

Biohub - Cell Tracking During Development logo

A challenge to track cells during Zebrafish development, with datasets available in OME-Zarr format.

Herculaneum Scrolls

Herculaneum Scrolls logo

Scrolls carbonized by Mount Vesuvius eruptions imaged via X-ray micro-CT, made available in OME-Zarr format. (data, source)

Broad Autoimmune Disease Machine Learning Challenge

Broad Autoimmune Disease Machine Learning Challenge logo

A challenge to predict gene expression in spatial transcriptomics data from matched pathology images. Uses the SpatialData specification, which includes OME-Zarr datasets. (data)

Datasets#

These are datasets available in OME-Zarr format, hosted in various locations. They represent some of the different scientific stories enabled by OME-Zarr.

Name

Link

Description

Open SciVis

Open SciVis logo

A collection of of volumetric datasets in OME-Zarr format, including several CT scans. (source)

VoDaSuRe

GitHub logo

A large-scale dataset covering volumetric super-resolution data with micro-CT (arXiv; dataset)

Other resources#

These are resources that may not be exclusively OME-Zarr, but include some OME-Zarr data that may be of interest to the community.

Name

Link

Description

DANDI

DANDI logo

BRAIN Initiative archive for publishing and sharing neurophysiology data (e.g. 000108)

Cell Painting Gallery

Cell Painting Gallery logo

A collection of datasets from the Cell Painting assay, a high-content image-based assay for profiling cellular phenotypes (e.g. cpg0004-lincs).

AIND - Mouse Neuroanatomy and Physiology Data

AIND logo

Datasets from the Allen Institute for Neural Dynamics, including OME-Zarr.

SpatialData datasets

SpatialData datasets logo

A collection of spatial omics datasets using the SpatialData specification, which includes OME-Zarr.