Describe complex symbols
Instantly expand Cm7(#11)/G or altered dominants into precise spellings, suggested scales, and playback.
Rust · WASM · CLI
Music theory helpers that ship with your code.
Kord is an open-source Rust library, CLI, and WASM module for parsing chord symbols, spelling notes, and inferring chords from pitches or short audio clips. This site is a thin demo of the same APIs compiled to the browser.
Inspect chord grammar with Describe, test voicings in Guess, or follow the docs to pull the crate and CLI into your own projects.
Guess chords from notes
Enter pitches or tap the built-in keyboard to surface voicings ranked by musical fit.
Listen in real time
Record a quick snippet and let our ML model surface the chords behind the sound.
Learn the internals
Dive into the documentation for CLI commands, WASM bindings, and theory notes that power the experience.