On-device Chrome extension that blocks credential leaks to LLM chats
Catch credentials and PII before pasting into ChatGPT, Claude, Gemini, and more LLM chats. Runs entirely on your device. Free, open source.
On-device Chrome extension that blocks credential leaks to LLM chats launched on June 3, 2026 with 5 votes, #2,466 of 22,647 launches that month and more than 75% of that year's launches.
What it does
Redact catches credentials and PII before they reach ChatGPT, Claude, Gemini and more. Runs in your browser. Chat transcripts sit on the provider's servers. You can't take it back. Redact intercepts pastes on supported chat sites. Detection runs in your browser. A local neural network scans each paste for credentials and PII. Inference runs in about 150 milliseconds. Set Block or Warn per data type from the popup. Defaults are tuned for engineers. Send a redacted version, send the original, or cancel before it reaches the chat. Detection runs locally. The extension makes no network calls. Every claim below is verifiable in the source. Active only on these chat sites. Want another? Open an…from redact.clearformlabs.com
Does a similar job
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Local Privacy Firewall-blocks PII and secrets before ChatGPT sees themDec 2025 · github.com · ▲111OP here. I built this because I recently caught myself almost pasting a block of logs containing AWS keys into Claude. The Problem: I need the reasoning capabilities of cloud models (GPT/Claude/Gemini), but I can't trust myself not to accidentally leak PII or secrets. The Solution: A Chrome extension that acts as a local middleware. It intercepts the prompt and runs a local BERT model (via a Python FastAPI backend) to scrub names, emails, and keys before the request leaves the browser. A few notes up front (to set expectations clearly): Everything runs 100% locally. Regex detection…
ChatGPT Plugins are a security nightmare2023 · github.com · ▲238New ways of breaking app-integrated LLMs . Contribute to greshake/llm-security development by creating an account on GitHub.




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