Key Detector 2.0 · 28 Sep 2026
Make the song work for you.
Find a starting key, practice a passage and keep your settings for next time.
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.
Your first result in two minutes
Find the key and tempo of a playing song.
02Read the result without over-trusting it
Use the estimate as a musical starting point.
03No audio detected?
Get back to a usable capture in three checks.
04Sing an E song in D
Change YouTube’s key independently of speed.
05Practice a passage, then save it
Repeat the difficult part and gradually return to normal speed.
06Playback controls and keyboard
Keep the passage, volume and playback position within reach.
07Save today. Resume next time.
Keep your chosen key, practice settings, chart and notes locally.
08Practice with a song from your computer
Open an audio file with its chords, loops, key and speed in one place.
09Shape the sound, on YouTube or any site
Remove the bass, reduce the voice or change the key of whatever is playing.
010Trial, Pro and your data
Know what is unlocked and what leaves your device.