Prompt Anonymizer — Free & Secure | werkzeuge

Strip names, e-mails, IBANs and more from a prompt before pasting it into ChatGPT or Claude — reversible, 100% in your browser. Nothing leaves your device.

Remove personal data from a prompt before pasting it into ChatGPT, Claude & co. The masking is reversible: paste the model's answer below to swap the placeholders back to your original data.

100% in your browser — nothing leaves your device.

1Anonymize prompt

What should be masked?

Names E-mail IBAN Tax number Phone Address/street Postal code

Names to mask (comma-separated)

Names without a title are only detected when you list them here — this prevents both data leaks and wrongly masked words.

Your prompt

!Names are only auto-detected with a title (Mr/Ms/Dr./Prof.) — add bare names to the list above. The heuristics can occasionally over-mask (e.g. a capitalised word or number sequence following a name); give the result a quick check. Everything stays in your browser.

2Re-hydrate the answer

Paste the LLM's answer here. The placeholders (e.g. {{PERSON_1}}) are swapped back to your original data locally.

LLM answer

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