Presidio JS — Client-Side PII Scanner

What it does

PresidioJS detects and anonymizes PII entirely in your browser. No servers, no API keys, no data ever leaves your machine. Supports regex-based detection (emails, phones, IBANs, credit cards, SSNs, crypto wallets, insurance numbers) plus browser-native NER for names, organizations, and locations using a local ML model. Built for privacy-first workflows like sanctions screening and compliance. One HTML file, zero dependencies, works offline. Open source and free.

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  Local 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…

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  A local-first, reversible PII scrubber for AI workflowsDec 2025 · medium.com · ▲38

  Hi HN, I’m one of the maintainers of Bridge Anonymization. We built this because the existing solutions for translating sensitive user content are insufficient for many of our privacy-concious clients (Governments, Banks, Healthcare, etc.). We couldn't send PII to third-party APIs, but standard redaction destroyed the translation quality. If you scrub "John" to "[PERSON]", the translation engine loses gender context (often defaulting to masculine), which breaks grammatical agreement in languages like French or German. So we built a reversible, local-first pipeline for Node.js/Bun. Here…

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  anonymize.solutionsMar 2026 · anonymize.solutions · ▲1

  Zero-Knowledge PII detection & anonymization in 48 languages

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  Self-host your data anonymization pipeline2025 · github.com · ▲5

  Needed this in my own work, anonymizing PII/PHI and decided to build this because presidio didn't really cut it for our use-case. Try it and maybe let me know if you have any feedback :)

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  promptShieldJul 2026 · promptshield.ca · ▲11

  Anonymize client docs before you paste them into AI

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  Local personal data redaction for any AI toolsJun 2026 · github.com · ▲12

  I built the desktop app that detects and redacts personal data (or PII) locally without sending any text to server. It supports rule-based filtering and AI model-based redaction (eg openai privacy filter). It's open source and free. Please check out the repo and https://pii-gui.vercel.app/

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