Parquet diff

Compare two Apache Parquet files — schema changes, row counts, and cell-level differences — entirely in your browser. Files never upload.

What it compares

• Schema changes — columns added, removed, or retyped between the two files.
• Row counts — the row total of each file and how many rows were compared.
• Cell-level differences — values that changed, compared positionally row by row.

Reading the result

Load a file into slot A and slot B. Identical files are reported as such; otherwise the schema diff, row counts, and the first changed cells are listed side by side.

Private by design

Both files are read locally in your browser; nothing is uploaded.