Device diagnostics · browser-local
Test a webcam and microphone privately with live preview, device selection, audio meter, noise-floor snapshot, test recording, and no upload.
Work happens in the current browser. The route does not require an account or a server-side processing job.
Interactive browser workspace
The live tool is loaded in this browser only. This tool can request camera, microphone only after you choose the relevant action.
Open this local tool →What it does
Browser compatibility
JavaScript and a modern browser; media capture tools require HTTPS and explicit permission.
Questions people ask
No. The live tracks, analyser, snapshot, and sample recording stay in the browser. Downloads are created from local Blob URLs.
Browsers commonly hide non-default device labels until permission is granted to reduce fingerprinting.
It is a digital level relative to the maximum representable signal. Zero dBFS is the digital ceiling; quieter values are negative.
Not in calibrated dB SPL. That requires a calibrated microphone and known gain chain.
The resolution selector is a browser constraint request. The camera and browser may negotiate a nearby supported setting, which the page then reports.
Yes. Turn either device off before starting. A microphone-only run keeps the preview area informational and still provides the meter, noise snapshot, and audio sample.
No. It plays a short local tone through the browser's current default output path. Output-device selection support varies.
