Drop a Song Here
MP3, WAV, FLAC, OGG, M4A — video files work too
How the BPM Finder Works
Drop an audio or video file and the tool listens to the whole track, marks where every beat falls, and works out the tempo from the spacing between them. The beats are found by a neural network trained on music whose beats people marked by hand, so it follows the pulse a listener would tap rather than counting loud peaks. You get the BPM as a whole number and to one decimal place.
It Reads Your File, Not a Database
Sites that look a song up by title can only answer for releases somebody has catalogued. This tool measures the audio you give it, so it works the same for a demo you recorded yesterday, a remix, a live bootleg, a sample pack loop or the soundtrack of a video. MP3, WAV, FLAC, OGG and M4A all open, and so do MP4, MOV, MKV and WebM video files.
Half Time and Double Time
A track at 87 BPM and the same track counted at 174 are one pulse written two ways, and which number is right depends on who is asking: a drummer counts the slow one, a drum and bass DJ the fast one. The two buttons under the result halve or double it in place. In our test on about 1,000 song excerpts the first number matched the human annotation for about eight songs in ten, and for most of the rest it was exactly half or double.
When a Song Has No Single Tempo
Music played without a click drifts, and classical pieces speed up and slow down on purpose. When the beats are not evenly spaced the tool says the tempo varies and shows the average, rather than presenting one number as if it held for the whole track. For speech, ambient pads or anything else without a pulse it reports that no steady beat was found. When the bars are consistently three or four beats long, it shows 3/4 or 4/4 as well.
The Key Comes With It
The same pass names the key of the song, major or minor. If the key is what you came for, the Song Key Finder page is this tool with the key first and its limits explained.
Open the Song Key Finder →No File? Tap the Tempo Instead
If the song is playing on a speaker or stuck in your head rather than saved on your device, tap along to it and read the BPM from your taps.
Open Tap Tempo →Then Change the Tempo
Knowing the BPM is usually the step before changing it. Speed & Pitch stretches a track to a new tempo without changing its pitch, or transposes it without changing its speed, so two songs can be brought to the same BPM before they are mixed.
Open Speed & Pitch →Tempo in Half a Minute
About thirty seconds for a four-minute song. It starts the moment you drop the file.Key Included
Every analysis shows the musical key next to the BPM.Nothing Is Uploaded
The song never leaves your device.Frequently Asked Questions
Drop the audio or video file onto this page. The tool analyzes it in your browser and shows the tempo in beats per minute, usually within half a minute for a four-minute song. If you do not have the file, use the Tap Tempo page and tap along while the song plays.
We ran it on GTZAN, a standard test set of about 1,000 thirty-second excerpts across ten genres. The tempo matched the human annotation within 4% for about 80% of them. Counting results that were exactly half, double, a third or triple of the annotated tempo, it was about 94%. It is strongest on music with a clear beat such as disco, hip-hop, rock and pop, and weakest on classical music, where the tempo itself changes.
Because both are correct descriptions of the same pulse. The tool reports the beat a listener would tap, which for some genres is half the figure producers quote. Press 2× or ½× under the result to switch.
No. The file is decoded and analyzed inside your browser. Only the analysis models are downloaded, and you can confirm in your browser's Network tab that no audio is sent.
Two small AI models, 12 MB together, the first time you use the tool. If you have never used one of the AI tools on this site, a 14 MB runtime comes with them. All of it is kept on your device afterwards, so later analyses start immediately.
MP3, WAV, FLAC, OGG, M4A, AAC, Opus, AIFF, WMA and AMR audio, and MP4, MOV, MKV and WebM video. Files can be up to ten minutes long.
Yes. There is no account and no watermark, and an analysis does not count against the daily export allowance the editing tools have, because nothing is exported.