Free tools
Free browser fingerprint tools
Test a browser, look up real user agents and Chrome versions, and see how detection reads each signal. No account, nothing to install.
Start here
Browser fingerprint test
Runs 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.
Run the testThis browser, right now
read on this page, not sent
- Browser
- …
- System
- …
- Screen
- …
- Time zone
- …
Check your browser
- What is my user agent?Your user agent and Client Hints, as the server and scripts see them.
- WebRTC leak testWhether WebRTC reveals another IP or your local address.
- JA4 fingerprint checkerYour JA4, JA3 and HTTP/2 fingerprints from a real handshake.
- TLS checkerYour TLS version, cipher suites, post-quantum key exchange, HTTP/2 and HTTP/3.
- Canvas fingerprint testYour canvas hash, and whether it stays the same between reads.
- WebGL test and fingerprintWhether WebGL works, and the GPU, extensions and limits it reveals.
- WebGPU testWhether WebGPU works, and the adapter, features and limits it exposes.
- Audio fingerprint testThe AudioContext value scripts compute, and whether it changes.
- Font fingerprint testWhich fonts a page can detect, and which OS they point to.
- What browser am I using?Your browser, its exact version, and whether it is up to date.
- What is my screen resolution?Resolution, scaling, window and viewport as websites see them.
Look something up
- Random user agent generatorReal, current user agents with the Client Hints that go with them.
- Chrome user agent stringsThe current Chrome user agent on every platform, plus Sec-CH-UA.
- Firefox user agent stringsCurrent Firefox user agents for desktop, Android and iPhone.
- Safari user agent stringsSafari on Mac, iPhone and iPad, and its frozen OS versions.
- Edge user agent stringsMicrosoft Edge user agents with their Sec-CH-UA brand list.
- Android user agent stringsChrome, Edge and Firefox on Android, and where the model went.
- iPhone user agent stringsSafari, Chrome and Firefox on iPhone, all on WebKit.
- Googlebot user agent stringsEvery Google crawler's user agent, and how to verify one.
- curl converterTurn a curl command into Python, curl_cffi, Node.js fetch or Go code.
- Chrome releasesWhat each Chrome version changed that a website can observe.
- Device profilesCaptured real-device fingerprints, ready to launch a browser with.
Understand the results
- Fingerprint check indexEvery check in the test, one page each.
- Fingerprint test sites, explainedWhat CreepJS, BrowserScan and the other test sites check.
- Browser fingerprint statisticsWhich values are common, and why rare never means fake.
- Methodology, scoring and limitsHow the test scores, and what a web page cannot prove.
- Detection research and sourcesThe public research behind the test's attributions.
Looking for the browser itself? Clearcote is free for one browser with GitHub, and the docs start with a two-minute install.