Which tool should I use?

Use the random user agent generator to create test strings, the user agent parser to decode a string you already have, and the fingerprint test to see how identifiable your own browser is right now.

Are these tools free and do they require sign up?

Yes to both. Every tool here is free, runs entirely in your browser, and needs no account, no email and no API key.

Free browser & user agent tools

Three focused, in-browser tools for working with user agents and browser fingerprints, plus every one of the 32 live signals on the dashboard, grouped by category below.

Random user agent generatorGenerator

Generate realistic, well-formed user agent strings for testing, filtered by desktop, mobile or tablet.

Open tool

User agent parserParser

Paste any user agent string and instantly see the browser, engine, OS and device it describes.

Open tool

Browser fingerprint testTest

See how identifiable your browser is from the combined signals it leaks, with an entropy estimate.

Open tool

Browse every signal by category

The dashboard groups all 32 client-side detectable signals into six categories. Each category has its own live page below, showing just those signals with the same detail as the full dashboard.

Browser5 signals

What your browser announces about itself on every request.

View category

Network8 signals

What your connection reveals, from your public IP to your headers.

View category

Location6 signals

What the Geolocation API can pin down, only with your permission.

View category

Display6 signals

The size, density and graphics of the screen you are reading on.

View category