Find your song’s BPM and key

Check the tempo and musical key, then make a music visualizer video with the same track.

Audio up to 50 MB · 10 minutes

Your song stays on this device.

Understand the tempo before using the track

BPM means beats per minute: it describes how fast you count the pulse. Musical key describes the tonal center, such as C major or A minor. They answer different questions. A tempo estimate can help you start a practice session; a key estimate can guide what to check by ear.

From your song to a music video

Choose the audio file. Use the recording you actually want to practice with or share.
Check the estimates and listen. A single number may not describe a song that speeds up or changes key.
Choose Create a music video. The same audio opens in the free music visualizer. Pick a style, frame shape and optional image.
Preview and export MP4. Review the movement and sound, then save your video.

Open the visualizer within ten minutes of sending the track. If the transfer expires or your browser cannot keep the file, return here and try again.

Need an excerpt first? Use Audio Cutter. If your starting file is a video, extract its audio. Browse all free tools.

BPM and song key questions

Which files can I analyze?

Choose one audio file up to 50 MB and 10 minutes. MP3, WAV, M4A, AAC, Ogg, Opus and FLAC are examples, provided your browser can read them. Mono and stereo are supported. Start with a file on your device, rather than a streaming link.

Are the BPM and key exact?

They are estimates from the whole recording. The tool looks for its main tempo and a major or minor key. Live performances, changing tempos and key changes can make one overall answer less useful. Check the result by listening before using it for practice or mixing.

Why is the BPM half or double what I expected?

A rhythm can be counted at different levels. For example, the same groove can feel like 70 or 140 BPM. Listen to the music and compare the pulse with the beat you mean to follow; the larger number is not automatically more accurate.

Why does one result say it could not be detected?

A short, silent or weakly rhythmic file may not give a clear tempo. Drums alone, noise or ambiguous harmony may not give a clear musical key. Tempo and key are estimated separately, so one may be available while the other is not.

Can I turn this track into a video?

Choose Create a music video to open the free visualizer with this same file. Pick a visual style and layout, preview, then export an MP4 with sound. When beat timings are available, you can use the optional beat pulse. Check its alignment and turn it off if it does not suit the music.

Is analysis free, and is my song uploaded?

Analysis and the linked free visualizer do not require an account or credits. Files are processed on your device. The finder does not upload your song or change its sound.