Kavach
Try Kavach
Type or paste a message. Kavach finds Indian personal details, replaces them with placeholders, and puts them back in the reply.
Runs entirely in your browser. Nothing you type is sent, stored or logged: this page is not allowed to make network requests at all. Still, please use made-up values.
1. Your message
2. What Kavach found
3. What the AI would see
4. The AI's reply
A pretend reply that uses the placeholders. Edit it to see what happens.
5. What you see
Kavach puts the original values back, only on your side.
Kavach can miss things and sometimes masks numbers that are not personal data; see the measured accuracy.
Use Kavach for real
The same detection rules, in three forms:
Chrome extension
Warns before you paste or send personal details on ChatGPT, Claude or Gemini, and masks them.
Coming soon to the Chrome Web Store.
Python package
Mask prompts before your app calls an LLM and restore the reply.
pip install kavach-pii
MCP server
Lets AI assistants such as Claude Desktop, Claude Code or Cursor work from a redacted copy of a file without seeing the personal data in it.
pip install "kavach-pii[mcp]"