Key & Scale Finder
Paste your chord progression to instantly detect the key, scale, compatible modes, and suggested chords. Upload audio for AI-powered detection.
Separate chords with spaces, dashes, commas or pipes. Supports major, minor, 7th, maj7, dim and more.
How to Find the Key of a Song
Knowing the key of your song is essential for writing melodies, choosing compatible chords, and collaborating with other musicians. Enter the chords you're using and our algorithm analyzes their relationship to determine the most likely key and scale. The tool also shows compatible modes like Dorian, Mixolydian and Phrygian — perfect for adding color to your production.
For audio-based detection, sign in to use our AI-powered analyzer that detects both key and BPM from any audio file. Combine this with the Chord Generator to build progressions in your detected key.