About Privacy Null
A free tool to hide sensitive data before asking AI for help. Built for developers who care about security.
Why Privacy Null?
AI assistants like ChatGPT and Claude are incredibly helpful for debugging code and solving programming problems. But when you paste your code, you might accidentally share sensitive information — API keys, database passwords, authentication tokens.
Privacy Null solves this problem. Paste your code, we automatically find and replace sensitive data with safe placeholders, you share with AI, and when you get the answer, restore the original values with one click.
Key Features
100% Local Processing
Everything runs in your browser. Your data never touches any server.
80+ Detection Rules
Detects API keys, passwords, tokens, emails, phone numbers, credit cards, and more.
Reversible Redaction
Get your original values back after the AI responds. One click to restore.
Open Source
Fully transparent. Inspect, modify, and self-host the code yourself.
Use Cases
Built With
Open Source & Free Forever
Privacy Null is and always will be free. Star us on GitHub if you find it useful!