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Data Anonymizer

Mask PII in datasets — names, emails, phones, IDs — with consistent fake replacements. Share analytics safely under privacy rules — local processing, free, no signup.

100% Local Browser Native

How to Use the Data Anonymizer

1. Paste the dataset

CSV, JSON, or logs with PII.

2. Mask PII

Consistent fake replacements per type.

3. Verify irreversibility

Spot-check no real values survive.

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Frequently Asked Questions

What gets masked?

Names, emails, phones, addresses, and ID patterns — replaced with format-valid fakes (not deletions) so joins and tests still run.

Consistent mapping?

Yes — same input always maps to the same fake within a run, preserving relationships for analytics. Regeneration uses fresh mapping.

GDPR-safe output?

Properly anonymized (irreversible) data exits GDPR scope; merely pseudonymized data does not. Know which standard your output meets before sharing.

Is source data uploaded?

No — masking runs locally in your browser. Source PII never leaves your device.

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Last updated October 2026