Professional online BPM and Key detection tool for analyzing audio tempo and musical key. Supports MP3, WAV, and more formats. Features Camelot Wheel notation and harmonic matching recommendations. Essential tool for DJs, music producers, and music cataloging. 100% browser-based processing for complete privacy.
Professional online BPM and Key detection tool for analyzing audio tempo and musical key. Supports MP3, WAV, and more formats. Features Camelot Wheel notation and harmonic matching recommendations. Essential tool for DJs, music producers, and music cataloging. 100% browser-based processing for complete privacy.
Most processing is designed to run in the browser whenever possible, which makes the tool useful for quick personal or work files. For sensitive, production, or regulated material, test with a sample first and confirm the target platform's format, size, and quality requirements.
BPM (Beats Per Minute) measures the tempo of music, indicating how fast or slow it is. For example, 120 BPM means 120 beats per minute. Higher BPM means faster tempo.
Key is the tonal center of music, including major and minor scales. For example, C major, A minor, etc. Key determines the emotional character and harmonic features of music.
The Camelot Wheel is a notation system commonly used by DJs, representing keys with numbers (1-12) and letters (A/B). Adjacent Camelot codes (±1 number or switch letter) can be mixed harmonically, helping DJs quickly find compatible songs.
The tool automatically displays harmonically compatible keys with the detected key. For example, if a song is 8A (Am), harmonic matches include 8B (C), 7A (Dm), and 9A (Em). Using these matched keys enables smooth musical transitions.
BPM detection accuracy is typically above 90%, and key detection accuracy is above 85%. The tool displays confidence scores to help you judge result reliability. For complex music or low-quality audio, accuracy may decrease.
Supports mainstream audio formats including MP3, WAV, OGG, M4A, and AAC. File size limit is 50MB.