Three ways to find the beat
BPM Finder
Use a file, tap along, or listen live. Nothing is uploaded.
Place the microphone near the music, then start listening.
Microphone audio is analyzed in this tab. It is not recorded or uploaded.Check the pulse by ear. Automatic detection can choose half-time or double-time.
Choose the input that fits
Upload one MP3, WAV, FLAC, AAC, OGG, or M4A file when you have the track. Use Tap Tempo when you can hear the beat yourself. Use Live Mic when music is playing nearby. File and microphone audio stay inside your browser and never leave your device.
Format support depends on the audio decoder in your browser. Current Chrome and Edge can decode the formats listed above.
The honest answer: BPM is an estimate
Tempo changes, syncopated rhythms, vocal-heavy tracks, and live recordings can confuse automatic detection. The result may also land on half-time or double-time because one groove can support more than one reasonable pulse.
Listen against the track before you rely on the number.
How this BPM finder works
For files and live microphone audio, the browser measures changes in signal energy and compares repeating onset intervals within the tempo range. Tap Tempo measures the time between your taps and averages the consistent intervals. No audio is sent to a server.
BPM finder FAQ
Is this bpmfinder also a BPM and key finder?
It finds tempo only. A BPM and key finder performs two different analyses; this page keeps the BPM result clear and does not claim to detect musical key.
Can I use this BPM key finder with an MP3?
You can use the BPM part with MP3, WAV, FLAC, AAC, OGG, and M4A files. Musical key is not calculated.
When should I use Tap Tempo?
Tap along when an automatic tempo finder struggles with a live recording, changing tempo, or an unusual rhythm. Eight to twelve even taps usually give you a steadier manual estimate.
Does Live Mic record my room?
No. The browser reads short audio samples while listening is active, calculates a tempo locally, and discards those samples when you stop or leave the page.