🔒 Your file is processed entirely in your browser — it never leaves your device.
Convert GRIB to JSON in your browser
Drop a .grib2 file, pick a variable, and download structured JSON with metadata, coordinates and grid values — perfect for web apps and pipelines. 100% local, no upload.
Why convert GRIB to JSON here
Structured, developer-friendly output with zero setup.
Developer-friendly JSON
Get metadata plus parallel lats / lons / values arrays you can drop straight into JavaScript, Python or any pipeline.
100% local
Decoded in your browser with WebAssembly — your file is never uploaded to a server.
No install, no Python
No cfgrib, no xarray, no command line. Open the page and drop your file.
Also CSV & GeoJSON
Need a different shape? Export the same variable as CSV or GeoJSON in one click.
Frequently asked questions
Related tools & guides
Want a spreadsheet instead, or just to look inside?