Clearcote Labs · Free tools
Free browser fingerprint tools
Test a browser, read what each check means, compare Chrome versions, and get real device profiles. No account, no install, nothing uploaded that the page does not show you.
- Browser fingerprint testRuns in your browserRuns a few hundred coherence checks on the browser you open it in and shows which of its signals contradict each other, what a detector reads into each one, and how to fix it.Open
- What is my user agent?Runs in your browserYour User-Agent string and Client Hints as our server received them and as scripts read them, in the page and in a worker, with a check that they all tell the same story.Open
- WebRTC leak testRuns in your browserWhether WebRTC reveals a public IP other than the one your connection uses, whether your local address is exposed, and whether your time zone and languages fit your IP's location.Open
- JA4 fingerprint checkerRuns in your browserYour JA4, JA3 and HTTP/2 fingerprints from a real handshake, compared part by part with Chrome's and with the HTTP clients we measured.Open
- Random user agent generatorReal, current user agents for Chrome, Edge and Firefox on every platform, each with the Client Hints the same browser sends, as a list or JSON.Open
- What browser am I using?Runs in your browserYour browser, its exact version and whether it is up to date, your operating system, and the basics every website can read.Open
- What is my screen resolution?Runs in your browserYour screen resolution as websites see it, the physical pixels and scaling behind it, and your window and viewport sizes.Open
- Chrome user agent stringsThe current Chrome user agent on every platform, the Sec-CH-UA list for every recent version, and a generator that follows Chromium's own rules.Open
- Chrome releasesRuns in your browserWhat each Chrome version changed that a page or server can observe, measured on real builds with a source link per change, and a live check of which version your own browser's engine matches.Open
- Fingerprint check indexEvery check in the test, one page each: what it reads, what genuine browsers return, and the practical resolution when it fails.Open
- Fingerprint test sites, explainedWhat Pixelscan, CreepJS, BrowserScan, BrowserLeaks and the others check, how they score, and what an ordinary browser gets on each.Open
- Browser fingerprint statisticsAn anonymous census of the browsers run through the test: which values are common, which are rare, and why unseen never means fake.Open
- Methodology, scoring and limitsHow the test decides what counts as coherent, which evidence is scored, and what a public web page cannot prove.Open
- Detection research and sourcesThe public detector artifacts, papers and open-source checks behind the test's attributions.Open
- Device profilesAn open library of captured real-device fingerprints, tagged by GPU vendor and filtered for virtual machines, ready to launch a browser with.Open
- Profile Manager appA free desktop app to create, organise and launch browser profiles with their own proxies and persistent identities.Open
Looking for the browser itself? Clearcote is free for one browser with GitHub, and the docs start with a two-minute install.