Browser-local / Footer only
Read the layout.
Keep your file local.
Inspect schema, row groups, encodings, codecs and min/max. Only header/footer slices are read; no file is uploaded. No external scripts, analytics or WASM download.
This is metadata inspection, not SQL execution. The integer range selector marks candidate groups from raw physical INT32/INT64 bounds. It cannot measure actual engine scans. Standard unencrypted PAR1 files only; footer ≤16 MiB, bounded parser complexity. Decimals/timestamps need logical interpretation; unsupported types stay candidates.
Choose your file or a synthetic sample to begin.