Analyze a Parquet file’s compression and row-group layout and re-encode it with a better codec. Runs locally in your browser — files never upload.
Reports the number of row groups, the total row count, and the compression codec(s) currently in use, along with findings about the file’s layout.
Re-encodes the data with SNAPPY and GZIP, reports the resulting size versus the original, marks the best option, and lets you download the optimized file.
Re-encoding works from decoded rows (types are re-inferred), so an already well-compressed file — for example one written with ZSTD — may not shrink. The report shows the honest result either way; the clear wins are uncompressed or badly-chunked files.
The file is analyzed locally in your browser; nothing is uploaded.