Claude
4576597e64
Chrome Manifest V3 extension that intercepts personal data and substitutes it with user-defined replacements before sending to Claude.ai. Hooks fetch() in the page's main world to catch API requests, with bidirectional substitution (real→fake on send, fake→real on display via reveal mode). Includes popup UI with mapping management, live test/diff view, activity log with badge count, options page with import/export, and Shadow DOM traversal for Claude.ai compatibility. https://claude.ai/code/session_01Dvgwe7XMoSxnWXkih8p1Cw
Silent Send
A Chrome extension that intercepts personal information and substitutes it with user-defined replacements before sending to Claude.ai.
How it works
- You define mappings — e.g. "John Smith" → "Alex Demo", "john@gmail.com" → "alex@example.com"
- You type normally — you see your real text while composing
- On send, it swaps — the extension intercepts the API request and replaces real values with substitutes
- Badge shows count — the extension icon shows how many substitutions were made
- Reveal mode — optionally translates Claude's responses back to your real data
How to verify it's working
- Badge count on the extension icon shows substitutions per page
- Activity tab in the popup shows a timestamped log of every substitution
- Test tab in the popup lets you type text and see the before/after diff
- Reveal mode (eye icon) toggles showing real vs substitute data in responses
- Browser DevTools → Console shows
[Silent Send] Substituted N value(s)messages
Installation (Developer Mode)
- Clone this repo
- Open
chrome://extensions/in Chrome - Enable Developer mode (top right)
- Click Load unpacked
- Select this directory
- Navigate to claude.ai — the extension is active
No build step needed. No Chrome Web Store required.
Architecture
manifest.json — Extension manifest (Manifest V3)
src/
background/
service-worker.js — Badge management, logging coordination
content/
injector.js — Content script (isolated world) — loads config, bridges messaging
content.js — Page script (main world) — hooks fetch(), does substitution
content.css — Visual indicators (highlights, reveals)
popup/
popup.html/css/js — Quick access: add mappings, view activity, test mode
options/
options.html/css/js — Full mapping management, import/export, settings
lib/
substitution-engine.js — Core find/replace logic
storage.js — Chrome storage wrapper
Privacy
- All data stays local in Chrome storage
- No external servers, no telemetry, no analytics
- The extension only activates on claude.ai