Detect the key of any song in your browser
Install our Chrome extension to analyze the music you listen to on YouTube, Spotify, SoundCloud, Bandcamp and more — right where it plays. No uploads needed; audio never leaves your device.
Works on any tab you're listening to
Guides on music theory, key detection, and harmonic mixing for DJs and producers.
Wondering 'what key is this song in'? Learn 4 fast ways to find the key of any song — with an online key finder, track metadata, or a quick ear test.
Everything you need to know about major and minor scales — the formulas, how they sound, the most common scale notes, and how DJs and producers use them.
Key signatures explained simply — what they are, how sharps and flats work, and how to read the key signature at the start of a staff. Includes clear examples.
Learn how to find the BPM of a song quickly — by counting manually, using a BPM finder or bpm calculator, or detecting tempo automatically from any file or YouTube track.
Learn how to prepare a DJ set from start to finish, including track selection, BPM, key detection, harmonic mixing, and the Camelot Wheel.
Why DJs need both BPM and key to mix well. Learn how a browser-based BPM and key finder works with streaming platforms and local files.
What is the Camelot Wheel? Complete guide for DJs. Learn how to use Camelot Wheel for harmonic mixing and better DJ sets.
Music theory for DJs made simple. Learn about keys, scales, key signatures, relative minors, and how to use them in your DJ sets.
Stop guessing the key of songs. Learn 3 proven methods to find any song's key — including a free browser tool with playable piano to verify by ear.
Learn how to mix tracks in compatible keys using the Camelot wheel. Includes interactive wheel demo and free tool to detect keys from YouTube, Spotify, and any browser tab.
