Detect the BPM of multiple audio files directly in your browser.
Choose or drop one or more audio files to detect their BPM in a batch.
Tell us what worked, what didn’t, or what you’d like to see next.
Choose or drop several supported audio files. Each track is analyzed in your browser and stays in the list while the queue runs.
Automatic BPM detection can report half or double the beat you count. Treat each number as an estimate and verify unusual results against the track.
Use the detected BPM to organize a library or decide which track to audition next. Open BPM Changer when you also need to change speed and export a copy.
The detector estimates tempo from the audio and works best when a clear beat is present. It can choose half-time or double-time, and tracks with weak or changing rhythm may fail. Check the result against the track before beatgridding or mixing.
No. Files are read and analyzed in your browser. The audio and detected results are not sent to SirenMix’s server.
The tool accepts MP3, WAV, FLAC, OGG, OGA, and OPUS files that your browser can decode. If a file cannot be decoded, remove it and try another supported file.
Analysis runs on your device and temporarily decodes each track, so CPU performance, available memory, and track length affect the wait. Close memory-heavy tabs or apps and try the latest Chrome; if it still fails, use a computer with more available memory.
Get the latest Google ChromeUse BPM Changer when you need to change speed and export a track, or read the BPM guide before preparing a set. Use Audio Converter when the finished file needs another format.