Chord Identifier — Identify Chords from Notes Online
Select a set of notes and instantly identify the chord they form. Includes alternate voicings, slash chords, and common extensions. 100% client-side — nothing leaves your browser.
How to Use the Chord Identifier
- Select notes — click the note buttons that make up the chord you want to identify.
- See the result — the main chord name appears instantly in the header.
- Explore alternates — click alternate interpretations to see how the same notes can be viewed differently.
- Adjust — add or remove notes to see how the chord changes.
Why Use This Chord Identifier
Working out what chord you're hearing or playing can be slow. This tool encodes the standard chord formulas — major, minor, diminished, augmented, sevenths, and their extensions — and matches them against the notes you provide. It handles all 12 keys and suggests sensible alternate spellings.
Everything runs instantly in your browser with no uploads. It pairs nicely with the MP3 to MIDI Converter — transcribe a melody, extract the pitches, then identify the harmony behind them.
Frequently Asked Questions
Triads (major, minor, diminished, augmented, suspended), all seventh chords (maj7, 7, m7, m7b5, dim7), ninths, elevenths, thirteenths, and slash chords such as C/E or Am7/G. Inversions are recognized automatically.
The identifier works with any subset of notes. With fewer notes it suggests the most likely chords; adding more notes narrows the result. The alternate interpretations list helps you explore the possibilities.
This tool works from note input. For audio, use the MP3 to MIDI Converter to extract pitches, then feed them into this identifier. You can also use the Scale Finder to find scales that fit your notes.