File & Data Workbench

Import, clean, compare and analyse CSV files without uploading them anywhere.

Tools

Import & Preview
Drop in a CSV, check its structure, detect column types and spot problems.
Clean
Remove duplicates, trim spaces, fix case, find and replace, handle empty values and edit columns, with a preview and undo for every step.
Compare
Match two files by key columns and see exactly what was added, removed or changed.
Analyse
Column profiles, data-quality score and charts built from your actual data.

How this workbench treats your data

Local processing
Files are read in your browser and never uploaded.
Every step reversible
Changes are recorded as steps you can undo or reset.
Original preserved
The file you import is kept unchanged for comparison.
Honest limits
Very large files depend on your device's memory; you'll be warned first.