Device Information
See the screen, browser, platform and capability values your browser exposes.
Runs entirely in your browser.
What This Browser Reports About Your Device
About Device Information
Everything here is read from the browser and displayed locally. Nothing is sent anywhere - which is worth saying plainly, because this is exactly the set of values that fingerprinting scripts collect and send off.
The most useful ones for building a site are the viewport size against the screen size, and the device pixel ratio. A phone reporting a 390-pixel viewport on an 1170-pixel screen has a ratio of 3, which is why a 390-pixel-wide image looks soft on it and a 1170-pixel one looks sharp.
Some values are deliberately imprecise or absent depending on the browser. Firefox and Safari round or omit hardware concurrency and device memory specifically to make fingerprinting harder, so a blank there is the browser protecting you rather than a fault here.
Other Developer Utilities
- JavaScript Key Code Info — event.key, code and keyCode
- Online Stopwatch — with lap times
- Docker Run to Compose — convert a run command
- ASCII Text Art — large letters for banners
- SVG Placeholder Generator — vector placeholder images
- Placeholder Image — a raster PNG or JPG placeholder
- User Agent Parser — break down a UA string
- Responsive Tester — preview a page at many sizes
- Dockerfile Generator — build a Dockerfile
- Live Code Preview — edit HTML, CSS and JS together
