Hey Product Hunt! 👋 I built LitmusAI because I kept catching myself half-believing things I read online, then closing the tab without ever checking if they were true. Fact-checking felt like a separate chore, so most people (me included) just skipped it. LitmusAI is a Chrome extension that checks claims in real time using live web search, right where you're already reading. Highlight a sentence and get a verdict. Scan a whole article and get every checkable claim flagged. It also works on live audio during a video call or stream, and on uploaded PDFs, images, or text files. A few things I focused on: - Bring your own AI key. You connect your own Anthropic, OpenAI, Gemini, or Perplexity key, so you control cost and which model does the checking. - Sources, not just a verdict. Every claim links back to what it found, so you can judge the evidence yourself instead of trusting a black box. - AI content detection. A separate signal for whether text or an image looks AI-generated, useful on its own. Free plan gives you 5 lifetime highlight-to-check runs, no card needed, so you can try it before deciding on anything else. Would love your feedback, especially on where the verdicts feel off or where the UI gets in your way. I'll be in the comments all day.

LitmusAI

Know what's true, as you read. Live audio, text, and files.

Know what's true, as you read. Live audio, text, and files.