is it ok
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Online tests
Check your browser, screen and devices.
Open a test to see what your browser can observe. No sign-in or download required.
01 / Display
Viewport Checker
See the current layout and visible viewport dimensions.
02 / Audio
Microphone Test
See whether your browser receives sound from your microphone.
03 / Display
Screen Resolution
Check the screen size and device pixel ratio reported by this browser.
04 / Display
Refresh Rate Test
Estimate how often the browser draws a frame while this tab is visible.
05 / Browser
Browser Checker
See the browser name, version and language reported to this page.
06 / Browser
Browser Feature Test
Check which web features this page can observe in your current browser.
07 / Video
Webcam Test
Start a local preview and check the image from your browser’s selected camera.
08 / Input
Keyboard Test
Focus the test area, then press and release keys to see what reaches the page.
09 / Input
Mouse Test
Move, click or scroll inside the test area to see the events received by this page.
10 / Display
Dead Pixel Test
Cycle through solid colors and look for dots that stay dark, bright or the same color.
11 / Compatibility
Requirements Checker
Check your current viewport and browser features against a preset or your own rules.
12 / Video calls
Video Call Check
Check the devices and browser settings you’ll use before you join a call.
13 / Audio
Speaker & Headphone Test
Play a short sound and confirm you can hear it.
14 / Input
Touchscreen Test
Draw in the test area and count simultaneous touches.