Sensitive CSV to JSON Anonymizer
Hash, mask, tokenize or drop any column of a CSV, then export it as clean CSV or JSON.
100% Private: all processing happens locally in your browser session. No data is sent to a server — the file never leaves your device.
Drop a CSV file here, or click to browse
Stays on your device · CSV, TEXT/CSV
Sharing a spreadsheet with a colleague, a contractor or a support ticket usually means sharing far more than you meant to — real names, email addresses, phone numbers and account IDs travel along with the numbers you actually wanted to discuss. This tool loads the file in your browser, shows you every column it found, and lets you decide one rule per column: keep it, drop it, hash it, mask it or swap it for a random token. Nothing is uploaded, which is the only sane way to handle a file you are anonymizing precisely because it is sensitive.
How to Use the CSV Anonymizer
- 1
Drop a .csv file onto the upload area and check the preview of the first five rows.
- 2
Pick a rule for each column: Keep, Drop, Hash (SHA-256), Mask or Randomize Token.
- 3
Watch the JSON preview update, and confirm no identifying values are left in it.
- 4
Download the anonymized CSV or JSON, or copy the JSON straight to your clipboard.
Why Use TextsPro
The file is parsed, transformed and re-exported entirely inside your browser tab using the built-in Web Crypto API for hashing — there is no upload, no temporary server copy and no request that could be logged, which matters enormously for a file that contains personal data. Hashing and tokenizing are consistent per value, so a customer ID that appears in five hundred rows becomes the same hash in all five hundred: your joins, counts and group-bys still work, while the identity behind them does not survive. Masking keeps the shape of a value recognisable, so an email still looks like an email and a card number still ends in the right four digits. Everything is free, with no row limit and no account.
- Processed in your browser — files are never uploaded
- Instant results with no queues or waiting
- No signup, no watermarks, completely free
Frequently Asked Questions
Ready-made presets
Same tool, already configured for a specific job.