Time ranges stay attached
Each likely chord is shown with a start and end time so you can jump back to the matching section of the song.
Chord Detector Online
Upload a song or passage to review an estimated chord timeline, likely major or minor labels, and the key used as context.
Browser analysisChord timelineNo credits required
Chord Detector capabilities at a glance
Chord labels are useful arrangement clues, especially when you know how to verify them against the recording.
- Input
- A browser-decodable audio file up to 100 MB
- Output
- Likely chord labels, time ranges, confidence, and estimated key
- Workflow
- Choose a file, analyze windows, inspect the chord sequence
- Privacy
- The selected audio is analyzed locally in the browser
A chord map for listening and arranging
The first result should help you decide where to listen next, not pretend that a dense mix has one perfect transcription.
Key context included
The estimated key gives the chord labels a tonal frame and helps you spot results that deserve an ear check.
Confidence is explicit
Bass movement, extensions, inversions, tuning, and overlapping parts can confuse a simple template matcher. The result keeps that limitation visible.
How to use a Chord Detector
Use the timeline as a listening aid, then confirm voicings and extensions with the source recording.
- 01
Choose the song or passage
A section with clear harmony works better than a drum-only intro or a very short sound effect.
- 02
Run the local analysis
The browser summarizes pitch-class energy across short windows and compares each window with basic major and minor chord shapes.
- 03
Listen and verify
Click through the time ranges, check the bass note and melody, and treat the labels as starting points for your arrangement or practice.
Where a chord estimate helps
A rough harmonic map can save time before a more careful transcription or production pass.
Song learning
Mark likely changes before working out exact voicings, rhythm, or capo position on an instrument.
Arrangement planning
Find repeated harmonic sections and compare them with a new melody, vocal, or generated music idea.
Sample exploration
Understand the tonal neighborhood of a loop before layering a bass line or another sample.
Use chord detection with musical judgment
Basic chord templates are a useful first pass, but real recordings contain more detail than a short label can represent.
Start with clean sections
Full-band choruses can create competing pitch evidence. A verse, piano passage, or isolated instrumental section may produce clearer labels.
Check inversions and extensions
A result such as C may be a C/E inversion, a seventh chord, or a passing harmony. Listen to the bass and top note before writing the final symbol.
Use the timeline comparatively
Repeated labels across similar sections are often more useful than one isolated label. Compare the sequence with the song structure and your musical ear.
Chord Detector questions, answered
Direct answers about chord estimates, accuracy, formats, and privacy.
Move from chords to production
Use the harmonic estimate alongside tempo, key, and focused audio editing.
Map the harmony you need
Give the timeline a real passage to inspect, then use its chord clues as a starting point for editing or study.
Detect chords