FREE CHORD DETECTOR.
Upload a track, confirm the tempo and time signature, get a chord-by-chord timeline with timestamps, bar numbers, and key. Free — no sign-up, up to 5 analyses per hour.
- · Harmonic content — piano, guitar, keys, pads — analyzes cleanest.
- · Single-note melodies aren't chords; detection needs stacked notes.
- · Heavy drums & bass can muddy things — try a stems-only pass if you have one.
- · 30–90 second clips are faster and more accurate than full songs.
This tool is a crumb. sonicdesk is the meal.
Chord detection is one bite of what we do. sonicdesk is a full workspace built for musicians and bands — versions, comments, structure, chords, chat, resources, mobile rehearsal — one place, one truth, no scattered files.
Chord detector FAQ.
Yes. Upload a track, confirm the tempo, get chords back with timestamps, bar numbers, and key — no sign-up, no credit card. Up to 5 free analyses per hour.
Upload an MP3, WAV, FLAC, OGG or M4A (up to 10 MB), enter the track's BPM (and time signature if it's not 4/4), and you get a chord-by-chord timeline with timestamps, bar numbers, and detected key.
Chord detection is bar-quantized — one chord per bar — and a bar's length is defined by tempo and time signature. Get those right first and the bar boundaries (and the chords) line up correctly.
Leave it on 4/4 — that's the default and it's correct for the large majority of songs.
Yes — alongside the chord timeline, it returns the detected root note and major/minor scale (e.g. "C major") for the whole track.
Recordings with clear harmonic content — piano, guitar, keys, pads — analyze most accurately. Melody-only lines, heavy drums, and dense bass can reduce accuracy. A 30–90 second clip works best.
No. Your file is analyzed in memory on the server and discarded immediately — nothing is stored once the analysis finishes.
Want to attach chord charts to your tracks, collaborate with your band, and version your demos?
Try sonicdesk →SEE THE WHOLE WORKSPACE.
Versioning · A/B compare · comments on bars · structure & chords · mobile mixer · rehearsal mode · resources · chat — one place, one truth.