Summarize any YouTube video in seconds
EvidenceLens is a free YouTube video summarizer for Chrome. Get key takeaways, transcript-grounded answers, cited sources, and research-backed claim checks beside the video.
A useful YouTube summary in three steps
Start with the takeaway, then inspect the evidence only when you need it.
Open a YouTube video
EvidenceLens sits beside the player in Chrome, Edge, Brave, Opera, and Vivaldi.
Generate the summary
The transcript becomes a clear main takeaway, key points, and structured notes.
Check the claims
Review verdicts, caveats, and links to the research behind factual claims.
Understand the video — and whether its claims hold up
Most YouTube summarizers stop at a recap. EvidenceLens also checks factual claims against an index of more than 200 million peer-reviewed publications and gives you sources you can open yourself.
Concise video summaries
Get the main takeaway and key points without watching the entire video.
Transcript-grounded answers
See answers based on what the video actually says, not a generic guess.
Research-backed claim checks
Compare factual claims with relevant peer-reviewed publications.
Follow-up questions
Ask for clarification, context, timestamps, or more detail when you need it.
Fast answers without hiding uncertainty
Every result stays connected to the original video and the research used to evaluate it.
Sources you can inspect
Open the cited papers and review the evidence behind each verdict.
Honest caveats
Mixed or limited research is shown as uncertain instead of forced into a confident answer.
Based on the transcript
Summaries and follow-up answers stay grounded in the content of the video.
Beside the YouTube player
Summarize and verify without leaving the video page.
YouTube summarizer FAQ
The practical details before you start.
Can EvidenceLens summarize any YouTube video?
EvidenceLens works with public YouTube videos that have an accessible transcript. Very new, private, age-restricted, or transcript-free videos may not be available for analysis.
Is the YouTube video summarizer free?
Yes. The free plan includes monthly summaries, claim checks, and chat messages. You can start without a credit card and upgrade only if you need higher limits.
Does it only create an AI summary?
No. Along with a concise summary, EvidenceLens identifies factual claims, checks them against peer-reviewed research, shows caveats, and links to the publications behind each verdict.
Where can I use it?
Use the Chrome extension beside YouTube on desktop, or send a YouTube link to the EvidenceLens app on Android or iPhone. The mobile app also supports articles and PDF documents.
Turn your next YouTube video into a clear, checkable summary
Start free. Get the key points, ask follow-up questions, and see what the research says.