Parquet X-ray

See how a Parquet file is laid out on disk: row groups, column chunks, pages, indexes, bloom filters and the footer.

Try it on Hugging Face →

Paste a Hub URL, an hf:// path, any URL that allows CORS range requests, or open a local file. Only the footer and page indexes are downloaded, so a 2 GB file opens after reading about 3 MB. Parsing uses hyparquet.

npm install
npm run dev       # http://localhost:5173/?url=sensors.parquet
npm run verify    # lint, type-check, tests, build

See CONTRIBUTING.md for how the code is organized.

Apache 2.0