Synonymis AI Privacy Shield

Redacts sensitive data in AI prompts. Features Replacements, Patterns, Smart Restore. 100% local - no data ever leaves your browser.

Keep your personal data private when pasting to AI chats. When you paste sensitive text (like an employee's review, a client's name or a secret project) into an AI chat, it's often sent to a server, stored, and might even be used for training. Synonymis AI Privacy Shield solves this. It's a 100% local tool that acts as your personal "redaction officer," ensuring your private data never leaves your machine. What It Does The extension works on a simple but powerful two-way system: IT REDACTS: When you paste text into ChatGPT, Gemini, or Claude, the extension instantly finds and redacts your sensitive data on paste, before it's sent. IT RESTORES: When you copy a redacted word (e.g., "My Manager") back from the AI chat, our "Smart Restore" feature automatically puts the original text ("Jane Smith") onto your clipboard. It's a seamless, "magic" workflow that lets you use AI without exposing your secrets. Core Features 100% Local and Private (The #1 Reason to Install) The extension runs entirely on your browser. Your custom words, your settings, and all your data never leave your computer. We do not have a server. We cannot see, collect, or log any of your activity. Custom Replacements You are in full control. You can teach the extension to recognize any sensitive word or phrase and replace it with a placeholder. Jane Smith → My Manager Oliver Johnson → Client-A Project Titan → Q4 Initiative Automatic Pattern Redaction Out of the box, the extension is already configured to find and redact the most common (and most dangerous) data patterns: Email Addresses, Phone Numbers, Credit Card Numbers, SSNs, IP Addresses, And more... "Smart Restore" This is the feature you'll love. You don't have to manually un-do the redactions. Just copy the text containing the placeholder ("My Manager") from the AI, and the original, real name ("Jane Smith") is what's on your clipboard, ready to be pasted everywhere. You get all the power of AI with none of the privacy risk. Get your "Privacy Shield" today.