“NASA confirmed the Earth is warming at an unprecedented rate.”
✅ TRUEHIGH
Multiple datasets confirm ~1.1°C warming since pre-industrial era.
NASA GISS · Mar 2024NOAA Climate Report
“The MMR vaccine has been proven to cause autism in children.”
❌ FALSEHIGH
The original Wakefield study was retracted for fraud. No causal link found.
The Lancet · Retraction 2010Cochrane Review · 2020
“Immigrants commit more crimes than native-born citizens.”
⚠️ CONTESTEDMEDIUM
Most studies show the opposite — findings vary by region and methodology.
Cato Institute · 2020Nat. Academy of Sciences
“5G towers were placed near schools to monitor children.”
🔍 UNVERIFIABLELOW
No credible evidence. Claim originates from anonymous conspiracy forums.
Full Fact · Apr 2023
“The US spends more on healthcare per capita than any other country.”
✅ TRUEHIGH
OECD data consistently shows US per-capita spending far exceeds peers.
OECD Health Statistics · 2023
“EVs produce more carbon than petrol cars when you factor in manufacturing.”
⚠️ CONTESTEDMEDIUM
Manufacturing is more carbon-intensive, but lifetime emissions depend on the grid.
Transport & Environment · 2023
Chrome Extension  ·  YouTube  ·  Coming Soon

Hear a claim.
Was that true?

Fact-check anything you hear on YouTube, instantly, without leaving the video.

2
people waiting
Toward our first 500

Free to install. No credit card required.

No data sold. Ever.
Your viewing history stays on your device.
No account required
Install and use it immediately, no sign-up.
Open methodology
How verdicts are reached is fully documented.
Peer-reviewed sources
Every verdict cites primary, verifiable evidence.

Three steps. Zero tab-switching.

You never leave the video. The answer comes to you.

Heads up — WasThatTrue is a desktop Chrome extension. Open this page on a laptop for the full demo.
→→
youtube.com/watch?v=xK29jR8m...
“…and vaccines have been linked to a dramatic rise in autism rates across the developed world.”
14:32 / 38:17
Click “Check this claim” →
The Truth About Vaccines: Separating Science from Misinformation
NewsBytes Daily
1.4M subscribers
2.1M views · 3 days ago
An in-depth look at vaccine science, misinformation, and the peer-reviewed studies that actually matter. We separate fact from fiction…
You hear something that sounds off.The speaker is making a bold claim mid-video. You don't have to open a new tab. You don't have to remember to check it later.
You decide what gets checked.Click the WasThatTrue button. It captures the claim from the video's live transcript and sends it to be verified — in seconds.
The verdict appears, right there. Verdict, confidence level, plain-language explanation, and primary sources — without leaving the video or losing your place.

Designs and verdict examples on this page are illustrative — the shipped extension may look slightly different.

Built for honest answers,
not engagement.

No algorithm decides what gets checked. No black box decides the verdict.

You trigger it. Not us.

Nothing is checked automatically. There is no passive surveillance of what you watch. You decide what warrants scrutiny — every time.

Primary sources, cited.

Every verdict links directly to peer-reviewed studies, government data, and established institutions. You can read the evidence yourself — always.

Honest about uncertainty.

Contested claims are labelled CONTESTED. Unverifiable claims are labelled UNVERIFIABLE. We don't force certainty where none exists. Doubt is a real answer.

The verdict system

No spin. Four honest labels.

The evidence determines the verdict — not the narrative.

✅ TRUE
Supported by evidence
The claim is corroborated by peer-reviewed studies or primary sources with high confidence.
❌ FALSE
Contradicted by evidence
The claim is directly refuted by credible, verified sources. The sources are listed so you can read them.
⚠️ CONTESTED
Genuine expert disagreement
Credible studies exist on multiple sides. We label it contested and show both positions — not a forced verdict.
🔍 UNVERIFIABLE
Cannot be confirmed
No credible evidence exists to confirm or deny the claim. We tell you that, rather than guessing.
“Built to combat misinformation in the age of post-truth politics.”

In an age of deepfakes and deliberate attempts to pollute our information landscape, the responsibility falls upon each of us to fact-check what we consume.

YouTube is the world's second-largest search engine. Billions of people form their beliefs about vaccines, climate, economics, and politics from what they watch.

WasThatTrue gives those viewers a tool, not an opinion. Honest about what the evidence says. Honest about when it doesn't.

Join the waitlist

Stop wondering.
Start knowing.

Join 2 people already on the waitlist. Be first in line for beta access.

Free to install. No credit card required.