BPM finder
Find the BPM and key of a song. Drop a file, tap along, use the microphone or share a tab. Nothing uploads.
Catalog
Tools on SongBPMFinder.com
Free music tools that run in your browser.
Tempo finder
Find the tempo of a song in BPM and see its classical term, such as Andante or Allegro. Same private, in-browser engine.
Key finder
Find the musical key and Camelot code of a song, with the keys that mix well and the BPM beside it.
Tap tempo
Tap the pad or press Space to find a BPM, hear it played back, and switch to half or double time.
BPM calculator
Work out BPM from beats and time or a loop length, convert milliseconds to BPM, and get note lengths for delays.
Pick your way in
Four ways to measure a tempo
Every tool above can be used these four ways. Choose the one that matches the music you have.
Upload songs
Drop up to 50 MP3, WAV, M4A, FLAC or OGG files, each up to 100 MB. You get BPM, key, Camelot code and a confidence label per file, and you can export the batch as a CSV.
Best for finished tracks, sample folders and DJ crates.
Tap tempo
Tap the pad or press the space bar in time with the music. Four taps give a steady reading, and a pause of more than two and a half seconds starts a new count.
Best when the song is in your head, on a stage or on a speaker.
Microphone
Play music near your device and the tool listens live. A first reading needs about six seconds, and a Locked badge appears once the tempo stays steady. Sound is analysed, never recorded.
Best for a record player, a rehearsal room or a radio.
Tab audio
Share a browser tab with sound switched on, and the tool reads the tempo of the video or stream playing in it. This needs Chrome or Edge on a desktop.
Best for audio that only exists inside a web page.
How it works
What stays on your device
Each tool on SongBPMFinder.com decodes the audio with your browser, then looks for the repeating pulse of the drums and bass. The maths runs on your own processor, so a file is never sent to a server and a result appears as soon as the analysis finishes.
The tools measure the sound you give them. They do not look a song up in a catalog, which is why they also work on demos, stems, bootlegs and live recordings. Each result shows a confidence label, ÷2 and ×2 buttons, and a beat grid you can play with a click track to confirm the number by ear.
Key detection is a beta estimate, and a song that speeds up or slows down has no single tempo, so the tools flag a drifting beat and show an average. When a reading looks wrong, the beat grid and the tap pad are there to settle it.
FAQ
Questions about these tools
Which tool should I use to find a song’s BPM?
Start with the BPM finder on the homepage. It handles uploaded files, tap tempo, the microphone and tab audio in one place, and it also reports the key and the Camelot code.
What is the difference between the BPM finder and the tempo finder?
They use the same engine and give the same number. The tempo finder page also shows the classical tempo term, such as Andante or Allegro, and a table of tempo bands, which suits students, teachers and anyone who thinks in tempo words.
Do these tools upload my music?
No. Every tool analyses audio inside your browser, so your files, microphone sound and shared tab audio never leave your device. There is no account and no stored audio.
Are the tools free, and is there a limit?
They are free, with no signup and no credits. The only limits are practical ones: up to 50 files at a time, 100 MB per file, clips of at least four seconds, and a tempo range of 60 to 200 BPM with half and double alternatives.
Which mode works best on a phone?
File upload and tap tempo are laid out for phone screens, and the microphone works wherever your mobile browser allows it. Tab audio capture is only available in desktop Chrome and Edge, because phones cannot share the sound of a tab.
Will more tools be added here?
This page lists only tools that are live and working. When a new one ships it appears here and in the Tools menu, so you never find a card that leads nowhere.