Free Chord Progression Finder

Chord Progression Finder

Upload a song and get a chord timeline you can recreate in your DAW.

Free to useNo account requiredFiles not stored

You found a beat. You want to recreate the progression. You don't have perfect pitch.

This tool figures out the chords for you. Upload any audio file and get a timeline of chord labels with timestamps. Cmaj, Am7, Dm7, G7 — whatever the song uses, we'll find it.

Export the chords as MIDI and drag them into your DAW. No more guessing, no more trial and error. Just upload, analyze, and start producing.

Prep Stack Workflow

Chord detection is part of a complete audio analysis workflow:

How It Works

1

Upload

Drop your audio file

2

Transcribe

Extract note events

3

Analyze

Match chord templates

4

Export

Get MIDI + timeline

Features

13 Chord Types

Major, minor, seventh, suspended, diminished, augmented

Confidence Scores

Know how certain each chord detection is

MIDI Export

Block chords ready for your DAW

Best Use Cases

Songwriters & Producers

Figure out the chord progression of a reference track to understand its structure and recreate the vibe in your own production.

Music Education

Analyze songs to learn common chord progressions, understand harmonic movement, and develop your ear training.

Remix & Sample Pipelines

Extract the harmony from samples so you can create complementary parts or transpose them to fit your project.

Cover Artists

Get the chord chart for any song without hunting for (often inaccurate) tabs online.

Honest Limitations

  • Full mixes are harder. Bass, melody, and pads competing can confuse chord inference.
  • Inversions aren't labeled. We detect the chord quality, not the bass note. No slash chords (yet).
  • Very short clips = unstable results. Longer audio gives more reliable progressions.
  • Drums reduce confidence. Percussive content has no pitch, so it can lower accuracy.
  • Complex jazz harmony is best-effort. Extended chords and rapid changes are challenging for any detector.

Frequently Asked Questions

How do I find the chords of a song?
Upload your audio file (MP3, WAV, FLAC, etc.) and click "Find Chords". Our algorithm transcribes the notes using machine learning, then analyzes them in time windows to identify chord patterns. You'll get a timeline of chords with timestamps you can follow along or export.
Can this detect chord progressions automatically?
Yes. The tool analyzes your audio in 2-second windows, identifies which notes are playing, and matches them against chord templates (major, minor, seventh chords, etc.). It outputs a full chord progression timeline with timestamps.
How accurate is chord detection?
Accuracy depends on the audio content. Clean recordings with clear harmonic content (piano, guitar, synths) typically achieve good results. Full mixes with drums, bass, and multiple instruments are more challenging. We show confidence scores so you know how certain each chord is.
Does it work on vocals-only?
Vocals can provide some harmonic information, but chord detection works best on instrumental content with clear pitched notes. Acapellas may give limited results since they typically contain only the melody, not full chord voicings.
Does it work on full mixes?
Yes, but with caveats. Full mixes work when harmonic elements (chords, bass, keys) are prominent. Very dense mixes with competing elements may show lower confidence or occasional errors. For best results, try isolating the harmonic elements first.
Can it detect seventh chords (Am7, G7)?
Yes. The chord detector includes templates for major, minor, diminished, augmented triads, plus seventh chords (maj7, min7, dom7, m7b5), suspended chords (sus2, sus4), and sixth chords. It picks the best match for each segment.
Why is confidence low?
Low confidence usually means: (1) the audio is mostly percussive with little pitched content, (2) multiple chords are equally likely, (3) the harmony is ambiguous or chromatic, or (4) there are many non-chord tones present. Try using a cleaner excerpt or isolating the harmonic elements.
Can I export chords to MIDI?
Yes. We generate a MIDI file with block chords for each detected chord segment. You can drag this into your DAW and use it as a starting point for your arrangement. The MIDI uses root position voicings in a comfortable piano range.
What audio formats are supported?
We support MP3, WAV, M4A, FLAC, and OGG audio files. Maximum file size is 25MB and maximum duration is 10 minutes. Files are normalized internally before analysis.
Do you store my audio?
No. Your audio is processed in a temporary directory and deleted immediately after analysis. The output files (JSON, CSV, MIDI) are stored for 2 hours to allow downloads, then automatically deleted. We don't keep copies of your music.
How do I use this with Audio to MIDI?
Great workflow! Use the Chord Finder to understand the harmony, then use Audio to MIDI to get the full note-level transcription. You'll have both the chord progression (structure) and the individual notes (details) for complete recreation.
How do I use this with the Key Detector?
Run both tools on the same audio. The Key Detector tells you the overall key and scale, while the Chord Finder gives you the specific progression. Together, you know both "what key is this in?" and "what chords does it use?"

Chord detection uses machine learning transcription followed by template-based harmony analysis.

Your audio is processed server-side and deleted immediately after analysis. Results are available for 2 hours, then automatically removed.

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