Omna is a free Chrome add-on designed to optimize interactions with AI language models by masking personally identifiable information (PII) before data is sent to AI servers. This tool is particularly beneficial for users who frequently copy and paste documents into AI applications like ChatGPT and Claude, ensuring that sensitive data remains confidential while reducing token usage. By leveraging a local Rust-powered WebAssembly engine, Omna efficiently filters the necessary context from larger datasets, allowing users to save on costs associated with AI queries.

The add-on features a seamless operation that detects and masks sensitive information such as names, emails, and financial data before it reaches AI servers. Users can paste text directly or attach documents, with Omna providing alerts for any potential PII detected. Additionally, a real-time token counter displays the savings, making it an invaluable tool for anyone looking to protect their privacy while utilizing AI technologies.