Audio Latency Tester

Measure your audio round-trip latency using your speakers and microphone.

Free & unlimitedWorks offline

Microphone access needed

This tool plays a short tone and listens through your microphone to measure round-trip latency. Audio stays on your device.

5 rounds by default · Configurable before starting

All processing happens in your browser. No data is sent to any server.

1
Allow microphone access
Grant microphone permission so the tool can detect the test tone played through your speakers.
2
Start the test
Click Start - the tool plays a beep through speakers and listens on the mic for the round-trip time.
3
Review results
After 5 automatic rounds, see your average round-trip audio latency in milliseconds.
4
Check audio context info
View output latency, base latency, and sample rate from the Web Audio API.

Place your microphone close to your speakers for the most accurate round-trip measurement.
Round-trip latency includes: audio output pipeline + air travel + mic input pipeline + browser processing.
Typical round-trip latency ranges from 10-50ms. Under 20ms is excellent for music production.
If mic access is denied, use the manual mode - it is less precise but still useful for rough estimates.