Mask or hide columns
Mask or hide columns in CSV and Excel
Replace or remove columns that may contain personal details, in your browser. A convenience for local cleanup — not a compliance, legal, or security review, and not a certificate that a file is safe to share.
- 1File
- 2Columns
- 3Download
Drop a CSV or Excel file
or choose a file from your computer
Choose file.csv, .xlsx, or .xls
Local cleanup only. This does not certify that a file is safe to share.