ChordSonic

ChordSonic is a free, no-paywall audio chord finder — and a genuine Chordify alternative that works on any track you can upload, not just a database of already-charted songs. Drop an MP3 or WAV and ChordSonic hears the chord progression, the key, the tempo and the beat grid straight from the audio, on an interactive play-along timeline. Unlike crowdsourced tab sites, it works on your own demos, live recordings, regional music with no fan transcriptions, and AI-generated tracks nobody has heard. What you can do:

• Get a full chord chart of any song with timing and play along
• See key + tempo (BPM) and transpose to any key or capo
• Split a track into stems (drums, bass, guitar, piano, vocals, other)
• Remove vocals for karaoke or isolate an a-cappella
• Transcribe melody/bassline to MIDI, or build a chord progression
• Export chord charts as TXT, CSV or JSON It analyses the audio, so coverage isn't limited to already-transcribed songs, and the chord timeline is never paywalled. Chord detection runs 80–95% accuracy on clean pop/rock/singer-songwriter recordings. Free to try, no signup.