Find the chords in any song with this free online chord detector. Upload a track and it analyses the harmony, lays out a chord timeline you can play along with, and lets you download a chord chart — all in your browser, with nothing uploaded and no signup.
Unlike a simple “what key is this” tool, this chord finder shows you the actual chord progression over time: tap any block on the timeline to jump to it, watch the current chord highlight as the song plays, and export the whole chart as text.
Chord Detector
Find the chords in any song. Upload a track and this tool analyses the harmony and lays out a chord timeline you can play along with, then download a chord chart. Everything runs in your browser — nothing is uploaded.
Chord detection from a finished mix is an estimate, not a transcription — it works best on songs with clear, simple harmony (fewer instruments, no heavy distortion) and can confuse a chord with its relative major/minor or miss passing chords. Use it as a strong starting point and trust your ear. Detected chords are major and minor triads; tap any block on the timeline to jump to it. For the overall key and tempo, use the BPM & Key Finder.
How to find the chords in a song
- Upload your track. Drag an MP3, WAV, M4A, OGG or FLAC onto the box (up to ~50 MB). It is analysed on your device — nothing is uploaded.
- Let it analyse. In a few seconds it detects the key and builds a chord timeline of major and minor chords.
- Play along. Press play and the current chord highlights as the song moves; tap any block to jump straight to that part.
- Download the chart. Click Download chord chart to save a timestamped text file of the whole progression.
How chord detection works
The tool breaks the song into short slices and measures how much energy sits on each of the twelve pitch classes — a “chroma” fingerprint. It matches that fingerprint against major and minor chord templates to pick the most likely chord for each moment, then smooths and joins the results into a clean timeline. Because it works from a finished mix rather than the original parts, treat the result as a strong estimate: it shines on songs with clear, simple harmony and can slip on dense, distorted or heavily-effected material, sometimes swapping a chord for its relative major or minor.
What you can use it for
- Learn a song — get the chords for a track you want to play on guitar or piano.
- Write a cover or mashup — see the progression so you can rearrange or match keys.
- Practice & ear training — check your own chord-by-ear guesses against the timeline.
- Sampling & production — know the harmony of a loop or sample before you build on it.
- Teaching — pull a quick chord chart for a lesson or a lead sheet.
Free, private, and fully in your browser
All decoding and analysis happen locally with the Web Audio API — your file never leaves your browser, there is no signup, and there is no watermark. For the overall key, tempo and Camelot code, use the BPM & Key Finder; to check individual notes, try the Online Tuner or Scale & Chord Finder. Writing your own music? Generate original AI songs with Solmi, then map their chords here.
Frequently asked questions
How do I find the chords in a song?
Upload the track here and wait a few seconds. The tool detects the key and shows a chord timeline; press play to follow the chords, or download a timestamped chord chart.
How accurate is the chord detection?
It is an estimate made from the finished mix, so it is strongest on songs with clear, simple harmony. Dense, distorted or heavily-produced tracks are harder, and it may occasionally swap a chord for its relative major or minor. Use it as a starting point and confirm by ear.
What chords can it detect?
Major and minor triads across all twelve keys. It doesn’t yet label sevenths, suspensions or extensions, but those usually sit close to the triad it reports.
Can I play along with the chords?
Yes. Press play and the current chord highlights on the timeline as the song moves. Tap any block to jump to that point.
Can I download the chords?
Yes — click Download chord chart for a plain-text file listing each chord with its timestamp, plus the detected key.
Does it upload my audio?
No. Everything runs in your browser using the Web Audio API; your file never leaves your device.
What audio formats are supported?
Any format your browser can decode — typically MP3, WAV, M4A/AAC, OGG and FLAC.
Does it work on mobile?
Yes, in modern mobile browsers, though longer songs analyse faster on a laptop or desktop.
Is it really free?
Completely — no signup, no watermark, no limits.