Find Key & BPM

Key and BPM finder

This page reports the musical key, the BPM, and the Camelot code for one MP3 or WAV. The file is analyzed in your browser and is not uploaded. YouTube, Spotify, and link import are not supported.

Drop a track, sample, or loop

Example result 120 BPM · A minor · 8A Try our 32-second synthetic clip. No file needed.

MP3 or WAV · At least 4 seconds · Up to 40 MB and 10 minutes · One file at a time

Free · No signup · Your audio stays on this device.
Correction history 0

Changes are saved in this browser. Save correction also submits feedback. For other changes, choose Submit feedback to share the audio identifier, detected and corrected values, analysis version, time, and your note. Your audio and filename are not sent. Submitted feedback is awaiting review, not a verified answer.

Clearing browser data removes local history. Export it to keep a copy. JSON exports include the filenames saved on this device.

How to use the key and BPM finder

  1. Choose a file

    Open a track, sample, or loop on your device. Use at least 4 seconds of MP3 or WAV audio.

  2. Check the candidates

    Listen to your audio and check the tempo and key. Half or double the beat may fit your project better.

  3. Copy into your workflow

    Copy BPM, musical key, or Camelot separately. Correct a result before bringing it into your music software.

See a complete example

Our original 32-second synthetic practice clip returned 120 BPM · A minor · 8A in Chrome. Follow the listening, half-tempo check and copying steps in the guide, or choose Try a sample above to run it here. This teaching exercise is a synthetic clip, not a test of other songs.

Try the worked example

Free BPM finder for songs, samples, and loops

This BPM detector estimates the tempo from the rhythm in your audio. You do not need the song title or artist: choose a file you have on your device. Song BPM means beats per minute, not the number of notes or the time signature. A steady pulse every half second is 120 BPM.

If you only need tempo, copy BPM on its own. If you also need harmony, the audio key finder suggests a major or minor key from the pitched content. A drum loop may have a usable BPM but no musical key.

No file available? Use the tap tempo BPM counter while listening. For a complete input-to-result example, follow the song BPM and key guide.

How do I find the tempo of a song?

To find BPM of a song, choose a local MP3 or WAV in the audio analyzer above. This tempo and key finder also reports a musical key and a Camelot code. If you have no file, use the BPM tapper and tap along with a steady beat. Both methods estimate tempo; tapping alone cannot detect musical key. Step-by-step methods are in how to find the BPM of a song. To convert a tempo to delay times, use bpm to ms.

Can I use this as an MP3 BPM finder?

Yes. Choose or drop a mono or stereo MP3; WAV also works. The file must be at least four seconds long, no larger than 40 MB, and no longer than ten minutes. If you only need the tempo, use the bpm finder. This song BPM finder analyzes the audio in your browser and does not upload the file. Half and Double are alternate counts of the same audio.

Looking up a score marking? Read our Moderato BPM guide, Allegretto BPM guide or Allegro BPM guide to compare published ranges and hear reference clicks. Walking pace has its own page, Andante BPM.

Counting in 6/8 or 3/4? Read the 6/8 and 3/4 time signature guide.

Reading a ¢ or 2/2 on a score? Read the cut time music guide.

What key is this song in?

Choose a local recording to get a musical key and its Camelot code. This is an audio key finder, not a song-title lookup. If you only need the musical key, use the key finder. A melody note alone does not establish the key, and two related keys can share the same notes. If the candidate sounds wrong, compare the melody, bass, and chords using the guide to how to find the key of a song. If the result is marked Low confidence, compare the main key and both Also possible options before correcting it. The percentage is this file's finder score for the selected key. It is not a counted success rate from a song test. Audio without enough pitched evidence remains Unclear.

What happens to my audio?

Audio is decoded and analyzed locally. Your audio and filename are never uploaded by this tool. Corrections are saved in this browser until you delete them or clear browser data. Choosing Save correction or Submit feedback sends the audio identifier, detected and corrected values, analysis version, time, and your note to the feedback server. Do not include personal information in a note. Deleting a local copy does not delete feedback already submitted. The live site loads Google Analytics to count page views, completed analyses, tap results, and first successful result copies. Audio and filenames are not sent there. There are no advertising scripts. Clearing a result releases its audio from this page; it preserves correction history. Normal requests to load the website still occur. Read the full privacy notice.

Can I use this as a Camelot key finder?

Yes. Each selected key also has a Camelot code you can copy for your DJ library. Camelot is another notation for that key. Numbers run from 1 to 12; A indicates minor and B indicates major. A minor is 8A, and C major is 8B. If you correct the key, its code updates automatically. The full map is in Camelot wheel explained.

Which files and recordings work best?

Choose a mono or stereo MP3 or WAV, up to 40 MB and 10 minutes. For files over 90 seconds, the tool samples 30-second sections from the beginning, middle, and end. Clear pitched music and steady rhythms provide the best evidence. Speech, live tempo changes, long silent intros, heavy distortion, and unusual tunings can produce Low confidence estimates; audio without enough pitched evidence remains Unclear. There is no YouTube, Spotify, or link import.