PseudoShield
Pseudonymize personal data before pasting into AI cats
What it does
Free, open source browser extension (Chrome + Firefox) that intercepts Ctrl+V on AI platforms and replaces personal data with deterministic pseudonyms before the text reaches the chat. 35 detection patterns (names, IBANs, national IDs, emails, phones, credit cards) with math validation. Works on ChatGPT, Claude, Gemini, Copilot, DeepSeek, Perplexity. 100% local. Zero network calls, zero tracking. GDPR Art. 30 audit log included. Built for lawyers, DPOs, doctors, and accountants.
Does the same job
all alternatives →- LPLocal Privacy Firewall-blocks PII and secrets before ChatGPT sees themDec 2025 · github.com · ▲111
OP 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…
- LBLocal Browser AIOct 2025 · blog.alexewerlof.com · ▲15
Using the new Prompt API to build a free open source privacy-first chat extension that runs on Chrome or Edge on Linux, Mac, Windows and ChromeOS
- BPBot, proxy and fake email detection without captchasOct 2025 · truesign.ai · ▲9
I've been researching the bot & proxies space for years. I slowly incubated a service to protect public forms, contents and APIs. It recenty reached a few million daily requests and I now dare to bring it to light. Truesign detects bots, proxies/vpns and fake emails, through a single request from the browser, without challenges or user interaction. It can block the request based on rules you choose, or grant a token with encrypted information about the visitor for you to decide. I created a few pages to showcase how it works: - https:/demo.truesign.ai/protected-form : a form…
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