Run a quick check before you join a call
Test your mic, webcam, and network in seconds.
Free browser-based tests that run locally on your device. Spot issues before Zoom, Teams, or Meet adds more variables.
Private by default
Audio and video stay on your device. No uploads.
Instant feedback
See in seconds whether your setup is working.
Clear next steps
If something is off, get quick fixes you can try immediately.
Device testing tools
Quick checks for audio, video, input, display, browser, and network.
Mic test
Test your microphone live, view levels, and record + playback.
Mic clipping test
Check whether your mic distorts when you get louder.
Background noise test
Estimate ambient noise and identify common sources.
Webcam test
Preview video, switch cameras, and check resolution.
Webcam FPS test
Measure frame rate and detect choppy video.
Webcam lighting test
Check lighting quality and get quick improvement tips.
Webcam flicker test
Detect flicker from indoor lighting (50/60 Hz).
Speaker test
Play left/right tones to confirm you can hear clearly.
Echo test
Test mic + speakers together to spot echo issues.
Keyboard test
Test keys and check for stuck keys or ghosting.
Mouse test
Test clicks, scrolling, and pointer accuracy.
Screen test
Check pixels, colors, brightness, and banding.
Browser capability test
Verify WebRTC/WebGL support before a call.
Screen sharing test
Test screen sharing before you present.
Device check
Quick check that your browser can access key devices.
Network test
Test network quality for calls: latency, jitter, stability.
Upload speed test
Measure upload speed for stable video calls.
Ping & jitter test
Measure ping and jitter to prevent dropouts.
Pre-call checklist
Run mic, camera, speakers, and network in one guided flow.
Why test before a call?
Most problems come down to permissions, wrong device selection, or network quality. A quick browser test saves time and stress.
- Confirm permissions (mic/webcam) before the call starts.
- Verify WebRTC and browser capabilities that meeting apps depend on.
- Check ping, jitter, and upload so audio/video stays stable.
Benchmarks for stable calls
Built by editors and engineers who troubleshoot calls
DevicePrep is run by a small team focused on practical diagnostics. We write test-first guides, keep them current as OS and meeting apps change, and design tools that help you verify results fast.
Want the details? Read our editorial policy and see how we handle data in our privacy policy.
Ready for your next call?
Run the pre-call checklist and test everything in under 60 seconds.
Start pre-call check