Open-source AI content detection and fact-checking browser extension.
A non-intrusive trust layer for the web — badges AI-generated text and images, flags bot accounts, and runs background fact-checks with source citations and confidence scores.
- Probabilistic, never definitive — all signals show confidence percentages, never hard verdicts
- Non-intrusive — badges appear inline, nothing is blocked without user opt-in
- Transparent — open source, auditable detection logic, caveats always shown
- Pluggable — community detectors can be added via the registry
git clone https://github.com/your-org/veridian
cd veridian
# No build step yet — load directly as unpacked extension- Open Chrome →
chrome://extensions - Enable Developer mode
- Click Load unpacked → select the
veridian/folder - Add API keys in the popup settings (all optional — heuristics work without them)
| Key | Purpose | Free tier |
|---|---|---|
| GPTZero | High-accuracy text detection | 10k words/month |
| Hive Moderation | Image/video AI detection | 100 req/day |
| Google Fact Check Tools | Claim verification | 1000 req/day |
| ClaimBuster | Claim extraction | Free research tier |
- Create
src/detectors/my-detector.jsextendingBaseDetector - Implement
async detect(payload) → DetectorResult - Register it in
src/detectors/registry.js
See src/detectors/text-heuristic.js for a minimal example.
- Firefox for Android support
- Image/video detection (Hive adapter)
- C2PA provenance reading
- Safari Web Extension wrapper (iOS)
- Shared community result cache (opt-in)
- Report export (PDF)
PRs welcome. Please read CONTRIBUTING.md before opening issues.
MIT