Browser & Device Tools
Free tools for checking what your browser is, what it can do, and whether your camera, microphone, and screen are set up correctly.
What browser am I using
See which browser, version, and OS you're running.
Screen resolution checker
See your screen size, viewport, and pixel ratio.
Microphone test
Check your microphone is working before a meeting.
Camera test
Check your webcam is working before a call.
FeaturedBrowser diagnostic
Full report: permissions, Web APIs, codecs, GPU, storage.
About browser & device tools
Browser and device tools answer questions about the software you're already running: which browser and version is this?, does my webcam actually work before the meeting?, what WebGL and codec support do I have? They're useful before a support call, a job interview, or a video conference — the moments where you really don't want to discover a hardware issue live.
Every tool here runs locally. The browser diagnostic reads capabilities exposed by the browser itself — no external probing. The microphone and camera tests use the standard Media APIs, and nothing is uploaded or recorded. The stream stops when you close the page or click stop.
If you're filing a support ticket or bug report, the browser diagnostic can export a Markdown-formatted report you can paste straight into the ticket.
Related guides
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How to test your microphone and camera before a Zoom call
The five-minute pre-meeting check that catches every common audio and video problem before anyone joins.
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User-agent strings vs. Client Hints: the modern way browsers identify themselves
Thirty years of historical baggage in a single string — and the slow transition to something that actually works.
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Pixels, viewports, and device pixel ratio: what each one actually measures
Four numbers describe your display, all called some flavour of "pixel" — and they can disagree by a factor of three. Here's what each one actually means.
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Why your microphone works in one app but not another
"I clicked Allow but it still doesn't work" — and the actual reason your microphone is silent in Chrome but fine in Zoom.
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Webcam permissions, indicators, and privacy — what each browser does differently
Granting a site camera access works the same way in every browser. Knowing the site has stopped using it does not.
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What every modern browser exposes about your device (and what it doesn't)
A surprising amount about your hardware is one JS call away. Some of it is genuinely useful. Most of it is fingerprint fuel.
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Why your microphone shows up but no one can hear you on Zoom
The most frustrating mic problem: every test says you're working, every meeting says you're silent. Four causes that account for the great majority of cases.
Frequently asked questions
Does the microphone or camera test upload my audio or video?
No. Both tools use the browser's Media APIs to access your microphone or camera locally. Nothing is uploaded, recorded, or sent to our server. When you close the tab or click stop, the stream is released.
Why does the browser ask for permission before the test runs?
That's the browser's own permission prompt, not ours. Microphones and cameras can only be used with explicit consent — we can't start a stream on your behalf. Granting access applies only to this site and is revoked when you close it.
What can the browser diagnostic tell me that the other tools can't?
The browser diagnostic is a full single-page report: permissions status, supported Web APIs, codec support, WebGL and GPU info, storage quotas, and more. It's designed for bug reports and compatibility debugging.
Does my browser version matter for these tools?
Most tools work on any modern browser. The camera test and some parts of the diagnostic require relatively recent Chrome, Firefox, Safari, or Edge. If a feature is unsupported, the tool will say so rather than fail silently.