Verify before you trust
Works with YouTube videos, articles, and PDFs. EvidenceLens extracts the claims that matter and checks them against research — with citations you can inspect.
A clearer way to read, watch, and trust what's persuasive.
Health, science, nutrition, psychology, climate, tech — content everywhere can make claims sound certain. EvidenceLens helps you get the gist of any video, article, or PDF, then see what published research actually supports.
Skip the long-watch gamble
Get the takeaway, key points, and context — for any video, article, or PDF — before spending your attention on the full thing.
Spot overconfident claims
EvidenceLens pulls out factual claims and flags what is supported, refuted, unclear, overstated, or missing evidence.
Check the sources yourself
Each verdict includes confidence, caveats, study context, and papers you can open yourself.
Two products, one account
The Chrome extension is purpose-built for YouTube. The mobile app extends the same evidence-aware analysis to any YouTube link, website, or PDF — so you can verify content wherever you find it.
Chrome extension
Works on YouTube videos only
The Chrome extension runs inside Chromium browsers and opens beside the YouTube player. Summarize the video, verify claims, and chat about the transcript without leaving the page.
- Summarize and verify YouTube videos beside the player
- Works in Chrome, Edge, Brave, Opera, and Vivaldi
- Does not support other websites or PDF files — use the mobile app for those
Mobile app
Verify any YouTube link, website, or PDF
The mobile app extends EvidenceLens beyond YouTube. Paste a link, share content from another app, or open a PDF — and get the same research-backed analysis on the go.
- YouTube videos via URL or the share sheet
- Any website or online article
- PDF research papers, reports, and documents
Both products share the same account, plan, and monthly credits — switch between them anytime.
From any source to verdict in four steps.
Drop in a video, article, or PDF. Scan the summary, check the claims, then ask follow-ups when you want more detail.
Pick what to verify
Open a YouTube video in Chrome, or paste a link, drop a PDF, or share an article into the mobile app.
Scan the brief
Start with the takeaway, key points, and the claims worth a closer look.
Review the evidence
See how each claim compares with published research, with the reasoning made visible.
Ask what still feels unclear
Ask about confusing claims, caveats, sources, or a specific timestamp.
See the evidence without leaving YouTube.
EvidenceLens lives where the video lives, with tabs for summary, evidence, chat, and settings.
Summary tab
Get the video's core argument, key points, and useful timestamps in a clean scan.
Claim verdicts
See the verdict, caveats, and credibility score for the video's central claim.
Claim details
Expand any claim to inspect confidence, source context, and referenced papers.
Evidence score
Quickly see what is supported, refuted, overstated, or still uncertain.
Built for active reading and watching — not passive scrolling.
Get the speed of a summary with the discipline of research checks — so persuasive content never gets a free pass.
Quick Brief
Turn long videos, articles, and PDFs into a focused brief — the answer, key points, and references all in one place.
Claim Check
See which claims are supported, refuted, unclear, or overstated according to peer-reviewed research.
Ask the Video
Chat with the source and evidence in context when you want a clearer explanation or deeper answer.
Research Index
Search across 200M+ indexed research papers instead of trusting generic AI memory.
Citations & Caveats
Open referenced papers, compare study types, and see where the evidence is strong or limited.
12 Languages
Read results in English, Polish, German, French, Spanish, Italian, Portuguese, Dutch, Russian, Chinese, Japanese, and Korean.
Built around the research, not just the prompt.
Generic AI can sound fluent while hiding where the answer came from. EvidenceLens starts with the actual source — a video, article, or PDF — extracts the exact claims, and checks them against a research index with citations, verdicts, and caveats.
Generic AI
- Can sound confident without surfacing original sources
- May answer around the claim instead of the exact transcript
- Often splits summary, verification, and chat across tools
EvidenceLens
- Starts from the actual source — video, article, or PDF — in context
- Checks claims against a large research-paper index
- Shows verdicts, caveats, citations, and chat in one place
For people who want more than a quick take.
Use EvidenceLens whenever what you watch, read, or skim could shape what you believe, buy, cite, or share.
Researchers
Scan popular videos, articles, and PDFs for alignment with the literature before you dig deeper.
Students
Get through lectures, papers, and dense PDFs faster — and avoid citing claims the evidence does not support.
Journalists
Turn viral videos, hot-take articles, and trending PDFs into claims you can check against publications.
Curious viewers
Keep learning across videos, articles, and PDFs — with a second opinion when a claim sounds too certain.
Invite a sharp thinker. You both get more checks.
Every successful signup from your referral link adds 25 monthly verifications for you and the person you invite. Share EvidenceLens with people who like their videos with receipts.
Start free. Upgrade when you want more evidence.
Every plan includes summaries, claim checks, and chat. Early Bird prices stay locked while the offer is available.
Free
For quick checks and first-time users
- 20 verifications / month
- 50 summaries / month
- 30 chat messages / month
- Evidence taxonomy & credibility score
- Unlimited verifications
Plus
For regular YouTube research sessions
Your rate stays locked while Early Bird lasts
- 300 verifications / month
- Unlimited summaries
- Unlimited chat messages
- Evidence taxonomy & credibility score
- Access to 200M+ papers
Plus Annual
Best value for frequent evidence checks
Your rate stays locked while Early Bird lasts
- Everything in Plus
- Billed once annually
- Priority support
- Early access to new features
- Save €29/year vs monthly
- Cancel anytime
- Locked-in pricing
All plans include access to 200M+ indexed papers · Prices in EUR · VAT may apply
Made for people who ask: source?
EvidenceLens helps sharp readers and viewers turn persuasive content into evidence they can inspect.
“I use EvidenceLens for every health-related video I watch. It caught an overstated claim about vitamin D that I would have completely believed otherwise.”
“Being able to instantly see which claims are backed by real papers, and which are not, has changed how I screen sources.”
“Finally, a tool that summarizes the video and then shows which claims actually hold up in the literature.”
Frequently asked questions
The practical details before you install.
EvidenceLens helps you verify factual claims against peer-reviewed research. The Chrome extension works on YouTube videos and opens beside the player to summarize content, extract claims, and check them against the literature. The mobile app extends the same workflow to any YouTube link, website, or PDF, so you can verify articles, reports, and documents on the go.
General-purpose AI tools can be useful, but they are not built specifically around YouTube transcripts and research verification. EvidenceLens is designed for the watching workflow: summary first, claim extraction next, then verdicts grounded in an indexed research database with citations and caveats.
Our database contains over 200 million indexed peer-reviewed publications sourced from established academic repositories and indexed on our own infrastructure. This includes papers across health, psychology, environment, education, economics, technology, engineering, and social science.
Yes, no credit card required. You get 20 verifications, 50 summaries, and 30 chat messages per month. When you need more, Plus includes 300 verifications and unlimited summaries and chat.
EvidenceLens extracts claims and matches them against peer-reviewed literature with semantic search. Each claim receives a nuanced verdict such as supported, refuted, overstated, or inconclusive, plus confidence levels and citations so you can review the evidence yourself.
The Chrome extension works in Chrome, Edge, Brave, Opera, and Vivaldi, and is purpose-built for YouTube videos. The mobile app on Android additionally accepts any website URL or PDF, so you can verify articles, reports, and documents in addition to YouTube content.
The Chrome extension is built around YouTube and opens beside the player to summarize the video, verify claims, and chat about the transcript. The mobile app handles a wider range of sources: YouTube videos, any website or online article, and PDF documents. Both share the same account, plan, and monthly credits, so you can move between them seamlessly.
Yes. There are no contracts or commitments. You can cancel your Plus subscription from your dashboard, and you will keep access until the end of your billing period.
Share your personal referral link from the dashboard. When someone creates an EvidenceLens account through it, both of you unlock 25 extra verifications per month. Referral rewards stack automatically with Free and Plus plans, up to five successful referrals per account.
We do not store video transcripts, web page text, or PDF content. They are processed in real time and discarded. We do not access your YouTube account, browsing history, or personal data beyond what is needed for authentication. See the privacy policy for full details.
EvidenceLens works best with content that makes empirical, scientific, or factual claims: videos, articles, research papers, and educational PDFs covering health, science, nutrition, psychology, climate, technology, and similar topics. It is less useful for music, entertainment, or purely subjective commentary.
Make every persuasive claim prove its point.
Try EvidenceLens free — briefs, claim checks, cited verdicts, and follow-up chat for videos, articles, and PDFs.
Free forever plan · no credit card · Browser extension and mobile app