Chord Identifier
Two ways to practise right here, with nothing to install. Train your ear against real piano recordings, or plug in a MIDI keyboard and watch what you play get named as you play it.
Train your ear
Ten questions, three tries each, up to 100 points — the same scoring the app uses. A correct first try is worth 10, second 6, third 3. Every option shares a root, so what is being tested is the chord's quality, which is the part that transfers to real music.
Name what you play
Connect a MIDI keyboard and ChordFrog names the chord under your hands — including inversions, slash chords, and seventh chords voiced without their fifth, which is how people actually play them.
This browser cannot reach MIDI devices. Web MIDI is not implemented in WebKit, and on iPhone and iPad every browser — Safari, Chrome, Firefox alike — runs on WebKit. So this is not something a different browser on your phone will fix, and no amount of JavaScript can work around it.
On a Mac or PC, Chrome, Edge and Firefox all support it. On iPhone and iPad, the app does this natively over USB or Bluetooth MIDI — that is what it was built for.
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Play three or more notes
Your browser will ask permission before any device is read. Nothing about what you play leaves the page — the recognition runs here, and there is no request to send it anywhere.