Why you should anonymize prompts before using AI
Every prompt you paste into ChatGPT, Claude, or Gemini may be retained, logged, or used to improve models depending on the provider and plan. If that prompt contains a customer's name, an employee's email, a live API key, or a credit-card number, you've effectively shared sensitive data with a third party — a real compliance and security risk. The AI Prompt Anonymizer removes that risk at the source by stripping identifiers out of your text before it ever leaves your browser, so you keep the productivity of AI without exposing people or secrets.
What it detects — and how accurately
The tool ships with 18+ purpose-built detectors covering emails, phone numbers, US Social Security numbers, credit-card numbers (validated with the Luhn checksum to avoid false positives), IPv4/IPv6 and MAC addresses, URLs, IBANs, crypto wallet addresses, JWTs, cloud API keys (OpenAI, AWS, Google, GitHub), street addresses, @handles, and best-effort person names. High-risk categories like secrets and card numbers are weighted heavily in the on-screen risk score so you can see at a glance how exposed a piece of text is.
Reversible by design
Redaction usually destroys information, which is a problem when the AI needs to answer using the very values you masked. This anonymizer solves that with reversible tokens: each unique value maps to a stable placeholder such as [PERSON_1] or [EMAIL_2]. Paste the assistant's reply into the Restore tab and every token is swapped back to your real data — giving you a private round-trip that no cloud service can see.
Private by default, free forever
There is no upload, no account, and no server call anywhere in this tool. All detection and masking happens with JavaScript on your device, which means it works offline, leaves no trace, and is safe for regulated data. Because it's fully client-side, it's also instant — you get live results as you type with no rate limits.
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- 18+ PII & secret detectors (email, phone, SSN, credit card, API key, IP, crypto wallet, IBAN & more)
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- Three masking modes: labeled tokens, solid redaction, or realistic fake data
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- Reversible tokens — restore the AI's reply back to your real values
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- Per-category toggles + custom always-mask terms
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- Live risk score and entity breakdown
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- 100% client-side — nothing is uploaded, logged, or stored
