LitmusAI

About

LitmusAI verifies claims in real time using Claude with grounded web
search, and runs entirely in your browser. Highlight a sentence, scan a page,
listen to a video, or drop in a file, and get a rated verdict with sources,
right where you found the claim.

CHECK FACTS ANYWHERE
• Selected text: highlight any passage and check it from the floating toolbar
  or the right-click menu.
• Whole pages: scan an article and verify its claims in one click, with an
  on-page scanning animation while it works.
• Live video audio: capture a YouTube or any video tab's audio, transcribe it,
  and fact-check spoken claims as they are said.
• Files: upload a PDF, image, or text file to check the claims inside it, or
  ask questions grounded in the file.

CLEAR RESULTS
• Every verdict sits on a false-to-true "litmus" scale, with a confidence
  reading and cited sources.
• False or misleading claims come with the accurate fact, so you leave with the
  right answer, not just a red flag.
• Ask follow-up questions about any result, right on the card.
• Verdicts stream in one at a time as each claim resolves.

BUILT TO STAY TIDY
• Three focused tabs: a live Feed, an Assets workspace for files, and a
  Sentiment tool.
• Select and delete individual results, or clear a tab in one tap.
• Collapse a file's results when a document has a lot of claims.
• A docked side panel keeps the UI open beside the page while a video plays.

MORE TOOLS
• Sentiment analysis: paste comments, tweets, or reviews and read the crowd's
  mood, the positive/negative/neutral split, and what is driving it.
• AI-origin detection: check whether an image or document is AI-generated,
  using verifiable C2PA Content Credentials and metadata where present, with an
  honest "likelihood, not proof" read otherwise.

PLANS
Free to start, with a few checks a day. Pro and Max unlock page scans, files,
sentiment, and AI-origin detection with higher daily limits; Max adds live audio
fact-checking and the Opus model. Paid plans are billed monthly through Stripe,
and you can manage or cancel anytime from the extension.

PRIVACY
Your check history stays in your browser. Content you choose to check is
forwarded by the LitmusAI service to the AI providers that power the checks
(Anthropic, and Deepgram for audio), and is not stored by us. Sign in is a simple
emailed code, no password. No tracking. See the privacy policy for full details.