Browser extension for Chrome, Firefox and Edge
A second opinion on every article you read.
Pruuf reads the news alongside you. It checks the claims against live sources, sets opinion aside, and tells you in one sentence what holds up.
Free daily checks, no account needed. Pruuf Pro removes the limit.
How it works
It knows when to speak up, and when to stay out of the way.
No buttons to remember. Pruuf decides whether a page is news before it shows you anything.
Nothing appears.
Shopping carts, inboxes, recipes. Pruuf stays silent on pages that aren't reporting.
You decide.
When a page is borderline, a small chip offers to check it. Nothing runs until you ask.
It checks on its own.
Pruufreading starts as the page loads, then settles into a small pill with the score.
Close it while it's reading and automatic checking turns off everywhere, until you switch it back on in settings.
The panel
Short on purpose. Deep when you want it.
Open the pill and you get four things, in the order you need them.
The score
One number from 0 to 100, and a bar showing how much of the article is checkable fact and how much is opinion. Opinion is set aside, not penalized.
The takeaway
One sentence on what holds up. Articles that make health, financial or legal claims get a plain reminder that Pruuf isn't professional advice.
Go deeper
Two short points, each under ten words, plus a longer note on how to read this kind of article. Collapsed until you ask for it.
The scorecard
All eight measures, problems first. Each flagged measure opens to one concrete reason. Measures that pass show a check, nothing more.
Every result carries this label, and it can't be turned off. Pruuf is a second opinion, not the final word.
Reading the score
Three bands. The pill tells you which one at a glance.
The pill is the same size for every score. Only the color changes, and lower scores pulse a few times before settling.
82see more ›Checks out
The facts we could verify hold up, and the sourcing is clear.
54see issues ›Worth a closer look
Some claims are unsupported, or something important is missing.
28see issues ›Didn't check out
Central claims couldn't be confirmed, or the article contradicts the record.
What we measure
Eight measures, weighted by what matters most.
Each is scored on its own, so a single headline number never hides where an article falls short.
Grounding
Scored against the world, not just the page.
A single AI model can sound sure and be wrong. So several models score each article independently, and every result passes through four checks before you see it.
Score validation
Every number is recalculated and cross-checked before the final score is computed.
Live web search
Key claims are researched against current sources. Claims that can't be verified count against the article.
Fact library
Facts from earlier analyses are kept, so new articles are checked for consistency with what's already established.
Human review
Low-confidence results are flagged for review, and corrections feed back into future scoring.
Opinion isn't a flaw.
Columns and analysis are part of good journalism. Pruuf flags opinion presented as fact, not opinion itself.
You stay the judge.
Every flag comes with one specific, checkable reason, so you can disagree with it. The label says AI analysis because that's what it is.
Ten languages.
Pruuf reads and explains articles in English, German, French, Spanish, Portuguese, Italian, Dutch, Swedish, Polish and Russian.
Read the news with a second opinion.
Free on Chrome, Edge, Brave and Firefox, with free checks every day. Pruuf Pro is for readers who want no limit.