The audio chord finder for any MP3 or WAV.

An audio chord finder is a tool that listens to a recording and works out which chords are being played at each moment in time. ChordSonic takes an MP3 or WAV upload, analyzes the harmony in the audio itself, and returns the full chord progression along with the tempo, beats and musical key. Unlike a chord-diagram lookup, you don't need to know the chord name first — the song tells us.

Our AI chord engine reads the whole song in context. On clean studio recordings with a clear harmonic structure — pop, rock, singer-songwriter, most ballads — we typically land in the 80–95% range on common major and minor chords. It also detects 7th and extended chords, though those are inherently harder and a little less reliable than plain triads. Accuracy drops on dense mixes, heavy distortion, and live recordings with crowd noise. The timeline always lets you scrub and verify each chord by ear, so it's a starting point you can correct, not a black box.

Yes. Anonymous visitors get 3 analyses per day and registered accounts get 5 per day, both at no cost. No credit card, no trial timer. The AI chord engine and enhanced 7th & suspended chords are included free for everyone. Paid plans add heavier quotas, longer tracks, stem separation and saved history, but the core chord lookup will always have a free tier.

MP3, WAV, M4A, MP4, FLAC and AIFF, up to 50 MB and roughly 10 minutes per track. That covers almost any single song at typical bitrates. If your file is longer or larger, trim it to the section you care about before uploading.

Yes — and for every other instrument. Because ChordSonic analyzes the audio itself rather than a specific instrument's fretboard or keyboard, it doesn't care whether the chords come from a guitar, piano, ukulele, organ, synth or a full band. If the harmony is audible in the recording, it gets detected.

Yes. Every analysis is exportable to TXT (a plain chord sheet you can paste anywhere), CSV (chord-with-timestamps for spreadsheets and DAWs) and JSON (for scripting and integrations). Exports are tied to your account so you can come back to a track later.

A chord-diagram tool takes a chord name you already know — say, F#m7 — and shows you a fingering. ChordSonic works the other way around: you give it an audio file and it tells you which chords are in it. The two tools complement each other — find the chords here, then look up the shape on your instrument of choice.