Free: access all catalog songs, add 5 new songs per month, edit charts, songs up to 12 minutes. Song packs: 10 songs ₹49/$2.99, 30 songs ₹99/$5.99, 100 songs ₹249/$12.99 (one-time purchase). FlexChords Pro (coming soon): ₹99/month or ₹799/year ($3.99/month or $29.99/year), includes unlimited songs u
Key features
Chord progression detection
Key identification using Krumhansl-Schmuckler profiles
Tempo/BPM detection from onset envelope
Interactive timeline of detected chords
Roman numeral chord notation
Export chord list as text or file
Supports MP3, WAV, M4A, AIFF, FLAC and OGG files
Automatic chord detection from YouTube videos and audio files
Real-time synced chord playback
Key and tempo detection
Instant chord transposition
Chart editing and customization
Slow down playback without pitch change (Pro)
Capo suggestions and simplified chords (Pro)
PDF export of chord sheets (Pro)
What makes it different
Runs entirely in browser with no uploads or server processing
Completely free with no daily limits or account required
Uses transparent signal processing instead of hidden machine learning
Shows actual detection results so you can see where it guesses
91% chord accuracy on unseen songs using proprietary model
All catalog songs free to play and transpose
User-editable charts saved to account
Crowdsourced chord library that improves for all users
EarChord
FlexChords