Chord Finder
Name any chord: type note names or click piano keys and get the chord name, chord tones, intervals and inversions — with a short explanation of why the match works. Free, no sign-up, everything runs in your browser.
Separate notes with spaces or commas. Sharps, flats and octave numbers work: F#, Bb, E♭4.
How to identify a chord
- Enter the notes. Click the piano keys, or type note names like
C E G. The lowest key you click counts as the bass note. - Read the match. You get the chord name, every chord tone with its role (root, third, fifth…), the inversion when the bass is not the root, and a short reason why the notes fit.
- Listen and refine. Play the notes back, remove a note or check the suggested missing note when no chord fits exactly.
Why the answer is explained
A chord name is only useful if you can trust it. Every result here shows the chord tones spelled from the chord's own letter names, the interval from the root for each tone, and the reasoning: which of your notes matched, whether the lowest note makes it an inversion, and when a note was respelled (an A♯ that the chord calls B♭). When your notes are one short of a bigger chord, the missing note is named instead of guessing.
Supported chord types
| Chord | Symbol | Intervals from the root |
|---|---|---|
| Major | C | root · major third · perfect fifth |
| Minor | Cm | root · minor third · perfect fifth |
| Diminished | Cdim | root · minor third · diminished fifth |
| Augmented | Caug | root · major third · augmented fifth |
| Power chord | C5 | root · perfect fifth |
| Suspended 2nd | Csus2 | root · major second · perfect fifth |
| Suspended 4th | Csus4 | root · perfect fourth · perfect fifth |
| Major sixth | C6 | root · major third · perfect fifth · major sixth |
| Minor sixth | Cm6 | root · minor third · perfect fifth · major sixth |
| Dominant seventh | C7 | root · major third · perfect fifth · minor seventh |
| Major seventh | Cmaj7 | root · major third · perfect fifth · major seventh |
| Minor seventh | Cm7 | root · minor third · perfect fifth · minor seventh |
| Minor major seventh | CmMaj7 | root · minor third · perfect fifth · major seventh |
| Half-diminished seventh | Cm7♭5 | root · minor third · diminished fifth · minor seventh |
| Diminished seventh | Cdim7 | root · minor third · diminished fifth · diminished seventh |
| Dominant seventh, suspended 4th | C7sus4 | root · perfect fourth · perfect fifth · minor seventh |
| Added ninth | Cadd9 | root · major third · perfect fifth · major ninth |
| Dominant ninth | C9 | root · major third · perfect fifth · minor seventh · major ninth |
| Major ninth | Cmaj9 | root · major third · perfect fifth · major seventh · major ninth |
| Minor ninth | Cm9 | root · minor third · perfect fifth · minor seventh · major ninth |
Frequently asked questions
What does this chord finder do?
You type note names (like C E G) or click piano keys, and the tool tells you which chord those notes form. It shows the chord name, every chord tone with its interval role, detects inversions (slash chords like C/E), suggests near matches when a note is missing, and can play the notes back. Everything runs locally in your browser.
How do I identify a chord by its notes?
Type the notes separated by spaces or commas, for example C E G or Bb, D, F, and press Identify. Sharps (#), flats (b) and octaves (A4) are supported. If you click piano keys instead, the lowest key you click counts as the bass note, so inversions are detected automatically.
Why do I see C♯ in one answer and D♭ in another?
C♯ and D♭ are the same piano key with two spellings (enharmonic notes). Chord names follow letter logic: a D♭ major chord is spelled D♭ F A♭, while C♯ major is C♯ E♯ G♯. The tool keeps your spelling when it matches and lists the alternative name with the other candidates.
What does a slash mean in a chord name like C/E?
A slash chord names the bass note after the slash. C/E is a C major chord with E as the lowest note — the first inversion. The tool only marks a slash when your lowest clicked key really is a chord tone, and it explains which chord member the bass note is.
Why was my note renamed, for example A♯ to B♭?
Chord tones are spelled by their letter distance from the root, so some keys get a different name inside a chord. An A♯ is the same key as B♭, but in an E♭ major chord that key is spelled B♭. The tool tells you whenever it respells a note you entered.
Which chord types are supported?
Major, minor, diminished and augmented triads; sus2, sus4 and power chords; sixth and minor sixth chords; dominant, major, minor, minor-major, half-diminished and diminished sevenths; dominant seventh suspended 4th; plus add9, 9, maj9 and m9 chords. Incomplete input gets the closest chords with the missing note named.
Can it identify chords from a song or from audio?
No. This tool works the other way around: you give it the notes, it names the chord. Automatic audio recognition is a different problem and is not part of this site. If you can pick out the notes, type or click them here instead.
Do you store the notes I enter?
No. Notes are matched in your browser and never sent to a server, and the site loads no analytics or tracking scripts at all. See the privacy page for details.