ChatDataMask: AI Privacy & PII Masking for ChatGPT, Claude, Gemini (GDPR)

Prevent data leaks: mask & redact 35+ types of PII & sensitive data locally before ChatGPT, Claude, Gemini see it. 1-click restore

ChatDataMask masks and redacts personal and confidential data (PII) right inside ChatGPT, Claude and Gemini before your message is sent: client and company names, emails, phone numbers, addresses, credit cards, IBANs, passwords, API keys and more. Detection and masking run locally in your browser, with no cloud redaction service in between, so your text never leaves your device to be checked, and the original sensitive values are not sent to the AI model. When the assistant replies, one click restores the original values in the answer, ready to use. Built for anyone who works with client data and other people's information, from solo professionals to whole companies: HR specialists and recruiters screening CVs, lawyers reviewing contracts, freelancers and copywriters handling client briefs, analysts working with financial reports, and teams that want employees to use chatbots at work safely. ChatDataMask adds a privacy-first data leak prevention layer between your people and the tools they use, without slowing anyone down. 🛡️ WORKS RIGHT INSIDE THE CHAT A shield in the ChatGPT, Claude or Gemini message field shows that ChatDataMask is active. Sensitive data is highlighted whether you paste text or type it, and you can mask it one value at a time or all at once with a single click. If you press Send while unmasked details are still in your message, you get a warning first and can mask them before anything goes out. Attached files, documents and screenshots are not scanned yet, so ChatDataMask reminds you to check them yourself before sending. 🔁 KEEPS THE ANSWER USEFUL The same value always gets the same mask, so the model still understands who is who and its answer stays coherent. It works as an AI anonymizer for your prompts while you keep the originals: because masking is reversible only on your device, it supports a pseudonymization workflow rather than irreversible anonymization. One click turns the masks in the reply back into the real values. 🧩 ANY OTHER AI TOOL For Microsoft Copilot, DeepSeek, Perplexity or any other assistant, open the Side Panel, mask your text there and paste it into the chat. Then paste the reply back into the Side Panel to restore the original values. 🔍 35+ DATA TYPES, AND GROWING Free for everyone: names of people and companies, emails, phone numbers, postal addresses, dates, IBAN and SWIFT codes, credit cards, money amounts, crypto wallets, passwords, API keys and access tokens, IP and MAC addresses, geolocation, VIN and IMEI. The Pro plan adds country-specific identifiers for the US, Germany, Poland, Spain and Ukraine, such as national ID, tax and VAT numbers, social security and business registry numbers, and license plates. New countries and formats are added regularly. 🌍 MADE FOR EUROPE, READY FOR THE US The interface is available in English, German, Polish, Spanish and Ukrainian, with detection tuned to the local formats of those countries, from phones and addresses to national identifiers. US formats such as SSNs and ABA routing numbers are covered too, so it works just as well for teams in the United States. ⚖️ DESIGNED FOR GDPR-CONSCIOUS TEAMS ChatDataMask follows the data-minimization principle at the heart of the EU GDPR and the EU AI Act: the less personal information reaches a cloud AI model, the lower the risk. In the US, it helps keep sensitive personal information (SPI), as defined by the California CCPA as amended by the CPRA, such as SSNs, account credentials and card details, out of chatbots. It is a technical safeguard that helps reduce the risk of exposure, not a certified compliance product, so always check it against your organization's data-protection policy.