Your first result in two minutes

Written for Key Detector 2.0. Chords, charts and practice sequences are beta: check them by ear. Images use simulated data; they illustrate the interface and are not evidence of audio accuracy. The Chrome Web Store may still be serving an earlier version for a few days after release.

Before you start

Chrome with Key Detector installed. The store version may differ from this local beta.

Steps

Pin Key Detector from Chrome’s Extensions menu.
Open a normal website tab, play a song and leave that tab selected. Open Key Detector from the toolbar.
Choose Detect, then Detect Key. Keep the popup open during the 15 or 30 second capture.
Read the main key, BPM and alternatives. Try a different musical passage if the result is ambiguous.

Expected result

A result card appears. The audio stays on your device.

If it does not work

Start playback first. Browser settings pages and protected media may prevent capture. Follow the capture help below.

Access

Free: 15/30 second captures. Pro/trial adds 45/60 seconds.

Interface preview with simulated data, 6 Oct 2026. Not a verified audio result.