Data Anonymizer
Paste or open a CSV, choose what happens to each column — keep, mask (J***n), hash, replace with realistic fake values, or drop — and download a shareable version. Equal inputs get equal replacements, so joins and group-bys still work.
Runs 100% in your browser — your files never leave your device.
Read the full guide to this tool
Notes
- Hashing is one-way (SHA-256, truncated) but consistent: the same email always maps to the same token, preserving relationships between rows.
- Masking and hashing direct identifiers is pseudonymization, not full anonymization — rare combinations of the remaining columns can still identify people.
- Runs 100% in your browser — your files and data never leave your device.
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