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Raster time series, ready to explore.

Raster time series, ready to explore.

chronozarr is an open Zarr v3 layout for raster time series. Keep native coordinates and numeric values, build a multiscale pyramid, and serve it from a static bucket. Read it in Python or explore it in the browser.

Get startedOpen the live viewerRead the specification
Ucayali River and surrounding forest in August 2016
August 2016
The same Ucayali River window in August 2020
August 2020
The same Ucayali River window in August 2025
August 2025
One place, through time. Sentinel-2 monthly composites of the Ucayali River, Peru, from the public demo store. These small RGB previews use pyramid level 3 and a display stretch; open the viewer to inspect values and coverage.

Create a store

Start with xarray, a NetCDF file, or a manifest of rasters. Encode the time axis and pyramid once.

Make your first store

Publish it

Upload static objects to a bucket. Check CORS, byte ranges, and decoding with the doctor command.

Set up hosting

Use it anywhere

Analyze in Python, fetch cells in JavaScript, add a MapLibre layer, or embed the chronozarr viewer.

Choose an integration