Echo and Latency Test

A free one-page check for acoustic echo and feedback. It plays a short chirp through your speakers, listens for the return, and estimates the round-trip audio latency and echo return loss - the "you're echoing" problem that plagues speakerphone calls. Runs entirely in this browser; nothing is recorded or uploaded.

Read the Echo and Latency Test guide for help reading the verdict or fixing an echo.

Privacy: Your microphone stays on this device. The tool plays a short chirp through your speakers and analyzes the returning sound entirely in this browser; the captured audio is measured in memory and immediately discarded, never recorded, saved, or uploaded. The mic track is stopped the moment the test ends. Only the measured delay, echo level, and device labels appear in the report - never any audio. View source to verify.

Configuration

Local check via getUserMedia + Web Audio API

Takes about 5 seconds and plays a brief chirp - set your volume to a normal level first. Your mic stays on this device; nothing is recorded or uploaded.

Status Check Step

Pending

Microphone access and echo setup

Click Start to allow the mic with echo cancellation off, so any echo is not hidden.

1 of 3

Pending

Chirp emitted and captured

Plays a short frequency sweep through the speakers and records the return.

2 of 3

Pending

Echo and latency analysis

Cross-correlates the sent and returned signal to find the delay and echo strength.

3 of 3