v1.0 Now Available

Privacy by Default

The local-first browser extension that intercepts secrets and PII before you hit send. No data ever leaves your device.

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Live Demo — type anything below

Why Fegis

Protect your data without sacrificing convenience.

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Local-Only Detection

All scanning happens directly within your browser instance. No text ever leaves your machine to be processed.

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Zero Data Leaks

Prevent accidental pastes of API keys, SSNs, and private tokens into ChatGPT, Reddit, or public forms.

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Instant Redaction

One-click scrubbing replaces sensitive data with safe placeholders before the network request is sent.

End-to-End Flow

How It Works

Your data is intercepted, redacted, and restored — all locally, before a single byte reaches the AI.

person
You
Type or paste text & files
Text PDF DOCX
Fegis — Detect & Redact
Intercepts PII before send
SSN Keys PII
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AI Services
Receives only safe, redacted text
ChatGPT Grok Gemini Perplexity
Fegis — Auto-Replace
Restores real values locally
Restore Local
verified_user
You
Reads AI response with real data shown
Private Safe
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100% Local
Detection & replacement run only in your browser.
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Seamless Restore
AI responses show your original data, not tokens.
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Works Everywhere
ChatGPT, Grok, Gemini, Perplexity & more.

Your data stays yours. Period.

Fegis is architected with a strict Local-First philosophy. We do not have servers that process your text inputs.

Regex pattern matching and Luhn algorithm checks happen entirely within the Chrome Extension sandbox on your machine.

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Data Uploaded
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Open Source