What is a BPM and key finder?
A BPM and key finder analyzes an audio file to estimate tempo in beats per minute and musical key, including Camelot notation for DJs. Everything runs in your browser and your file is not sent to a server.
What is Camelot notation?
Camelot notation is a DJ-friendly key code (such as 8A or 9B) used for harmonic mixing. This tool maps the detected musical key to the matching Camelot code so you can match compatible tracks in a set. Use our
Camelot Wheel to highlight compatible neighbours for harmonic mixing.
What key am I in?
Upload your track and click Analyze. The tool detects the musical key from the harmonic
content of your audio and returns the root note, scale (major or minor), confidence level,
and Camelot code.
If your track is in C major, for example, the result will show C Major with its matching
Camelot code 8B. Key detection works best on tracks with clear harmonic content such as
chords, basslines, or melodic elements. Then use our
Camelot Wheel to see which keys mix well with your result.
How do I find the key of a song?
Upload your track and click Analyze. The tool uses chroma-based key detection on a steady section of the audio and returns the key, scale (major or minor), confidence, and Camelot code.
How do I find the BPM of a song?
Upload your track, click Analyze, and wait a few seconds. The BPM and key finder measures rhythmic onsets in the audio and estimates the most likely tempo. For best results, use a section with a steady beat and at least a few seconds of audio.
Does this BPM and key finder work with other formats?
Yes. You can use this BPM and key finder with MP3 or upload WAV, FLAC, M4A, AAC, OGG, and other common formats supported by your browser's audio decoder.
How accurate is online BPM detection?
Accuracy depends on the track. Clear drums and a steady tempo usually produce strong results. Ambient music, rubato performances, or songs with tempo changes are harder to read. Trust your ears for final decisions.
BPM and key finder vs tap tempo: which should I use?
Use the BPM and key finder when you have an audio file and want automatic detection. Use tap tempo when you are listening to a song and want to tap along manually. Both are free on Jukeblocks and work in the browser.
Can I find the BPM of a song online for free?
Yes. Upload your audio file and the BPM and key finder will estimate the tempo directly in your browser for free. No software installation is required.
How BPM and key detection works
The tool analyzes a steady middle section of your audio in the browser to estimate BPM
and musical key. Strong drums improve tempo accuracy; clear harmonic content improves
key detection.
Files are processed locally and are not uploaded to a server. DJs and producers use
BPM and key info for harmonic mixing, remixing, and playlist prep.