CSV Shield

Prepare a CSV for sharing: drop, redact or mask sensitive columns and replace identifiers with consistent tokens, so the same customer gets the same token in every row and file that uses your key.

🔒Stays on your device. Parsing and masking run in your browser. This page's security policy blocks it from sending data to any other server.

Pseudonymization is not anonymization. Anyone who has your secret key can re-create tokens for known values and link them back. Columns you keep — and combinations like ZIP code + birth year + gender — can still identify people. Review the result before sharing, and treat the output as personal data where the law says so.