Why does the measured fps differ from the reported frame rate?

The reported frame rate comes from the camera driver's negotiated setting, which is a target, not a guarantee. The measured fps counts frames actually delivered to the page, so it reflects real conditions like lighting, USB bandwidth, or CPU load.

Does this tool record or upload my video?

No. The preview runs entirely in your browser using getUserMedia, and nothing is sent to a server. The only thing that leaves your device is a snapshot PNG you explicitly choose to download.

Why is my camera light staying on after I close the tab?

It shouldn't — this tool stops all camera tracks when you switch cameras, when the tab is hidden, and when you leave the page. If a light stays on, it's usually another app or tab still holding the camera.

Yes. Every tool is free to use, with no account and no credit card. The work runs on your device rather than on our servers, which is what keeps it free to run.

Does it work on mobile?

Yes. It runs in current mobile browsers on iOS and Android, with nothing to install.

📷

Free Webcam Test

Check that your webcam works before a call — live preview, actual resolution and frame rate, and a snapshot you can download.

Runs in your browserNo sign-up, no pop-upsNo login requiredFree foreverNo installWorks in your browserCamera stays local

Works offline once loaded

🔒 Your video never leaves your device — nothing is uploaded or recorded anywhere.

Optimize for your platform

Online Mirror — Use Your Camera as a Mirror

How It Works

The tool asks your browser for camera access, reads back the resolution and frame rate the camera actually negotiated, and times incoming video frames to compute a live fps reading.

1
Allow camera access
Your browser asks for permission once; the video stream never leaves your device.
2
Read the real settings
The tool reads the negotiated width, height, and frame rate straight from the video track — not just what was requested.
3
Measure live fps
Each delivered video frame is timestamped and averaged over a rolling window to show the actual frame rate you're getting right now.
4
Snapshot and download
Capture the current frame to a canvas and download it as a PNG, entirely offline.

Video is processed only in your browser tab and is never uploaded, streamed, or stored — closing the tab or switching cameras stops the camera immediately.

Related Tools

🎙️

Microphone Test

Check that your microphone works before a call or recording: pick the input device, watch a live level meter and waveform, and record a 5-second playback sample.

Try it

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