Credibility Analyzer
Fact-check any page or selection in the browser you already use
Credibility Analyzer is a browser extension that fact-checks the page you are reading — or a passage you highlight — without leaving Chrome, Firefox, or Safari.
You get a credibility score from 1 to 10, a short verdict, and claim-by-claim findings labeled verified, partially verified, unverified, or false/misleading. If Media Bias/Fact Check has a rating for the publisher, that appears as background — it never replaces the claim check.
Bring your own API key. Gemini Flash can ground the analysis in live search. Claude and GPT-5.6 reason from their training knowledge. On Chrome you can also run Gemini Nano on-device so the text never leaves your machine.
Same extension, four installs: Chrome Web Store, Firefox Add-ons, Safari on iPhone, and Safari on Mac.
Features
- Works on Chrome, Firefox, Safari iOS, and Safari Mac
- Toolbar analysis of the full page, or highlight text and choose Analyze credibility
- 1–10 credibility score with a short verdict
- Claim-by-claim findings with verified, partially verified, unverified, or false/misleading labels
- Source links when Gemini web grounding returns citations
- Optional Media Bias/Fact Check publisher rating
- Results in the same language as the page when possible
- Bring your own Gemini, Claude, or OpenAI API key — no account with us
- Chrome-only option: on-device Gemini Nano for local analysis
Cloud models use your own API keys and are billed by Google, Anthropic, or OpenAI. Gemini Nano is Chrome-only.
Screenshots
