No sign-up, no software, and nothing leaves your device. Drop in a track and the tool reads its tempo and musical key in a few seconds, right in your browser.
Drag in an MP3, WAV, M4A, FLAC, or OGG file, or tap to browse. The audio is decoded locally and never uploaded to a server, so it works just as well on an unreleased demo, a rough bounce, or a track you downloaded as it does on a finished release.
The tool analyzes the waveform and reports the tempo in beats per minute and the musical key, for example 128 BPM in A minor. A confidence indicator sits next to each result, so you know when a track is clear and steady versus ambient or rubato, where the estimate is softer.
Every key comes with its Camelot / DJ code, like 8A, so you can build harmonic transitions and find compatible tracks the way Beatport and Mixed In Key label them. When you would rather make something new at that tempo and key, send it straight to the AI song generator.
A fast, private BPM and key finder that runs entirely in your browser, built for DJs, producers, and anyone who needs the tempo and key of a track without a paid app.
Detects the tempo in beats per minute straight from the audio, so you can beatmatch, set a metronome, or line up a sample without counting bars by hand.
Estimates the key across all 24 major and minor keys by analyzing the pitch content of the track, then names it plainly, like G minor, not just a number.
Shows the Camelot code alongside the key so you can mix harmonically and find compatible tracks the same way Mixed In Key and Beatport label them.
No file to hand? Switch to the tap tempo pad and tap along with a beat you are hearing, in a rehearsal, on the radio, or in your head, to read the BPM live.
Because the analysis runs in your browser and nothing is uploaded, you can check the tempo and key of a private demo or a bounce that no database has ever seen.
No account, no credit card, no install, and no watermark. Analyze as many tracks as you want, and your audio never leaves your device.
One tool, several very different jobs, from a club set to a bedroom beat to a first guitar cover.
Challenges
Solution
Drop each track in to read its BPM and Camelot code, then mix into neighbors on the wheel for harmonic transitions. It reads the tempo and key the same way Mixed In Key and Beatport label them, for free.
Challenges
Solution
Analyze the sample or acapella to get its BPM and key, then pitch or time-stretch it to match your project, or build your beat around those numbers from the start.
Challenges
Solution
Load the song to see its key and BPM, then set your metronome, transpose to a comfortable key, and practice along with confidence instead of guessing.
Challenges
Solution
Check each track to read its BPM, or use the tap tempo pad to clock a song playing in the room, then order your set list from slow to fast with the numbers to back it up.
Challenges
Solution
Analyze both tracks to compare their tempo and key, decide which to shift and by how much, and start your edit knowing the two will actually sit together.
How the detection works, what it is good for, and the honest limits of estimating tempo and key from audio.
Upload the song using the Analyze a song tab and the tool reads its tempo in beats per minute directly from the audio, usually in a few seconds. If you do not have the file, switch to the Tap tempo tab and tap along with the beat to read the BPM live by ear. Either way nothing is uploaded to a server, the analysis runs entirely in your browser.
Drop the track into the Analyze a song tab and the tool estimates its musical key, naming both the note and the mode, for example E minor or C major. It works by measuring which pitches are most present across the whole track and matching that profile against all 24 keys. A confidence indicator tells you how clear the result is, since some songs sit firmly in one key while others are more ambiguous.
The Camelot system relabels every key with a number and a letter, like 8A for A minor, so DJs can mix harmonically without reading music. Tracks whose Camelot codes are next to each other on the wheel, or share the same number, tend to blend smoothly. This tool shows the Camelot code next to every key it detects, the same notation Mixed In Key and Beatport use, so you can spot compatible tracks at a glance.
Yes, completely. There is no account, no credit card, no install, and no limit on how many tracks you can analyze. The tool is free because the work happens in your browser rather than on a paid server, which is also why your audio never has to leave your device.
BPM detection is very reliable on music with a clear, steady beat, and key detection is strong on most songs, but both are estimates read from the audio signal, not values looked up in a licensed database. Treat them as a strong starting point. Tempo is most solid on rhythmic tracks, key is most solid when a song stays in one tonal center, and the confidence indicator flags when a result is softer so you can trust your own ear on the edge cases.
Yes, and this is where a signal based tool has an edge over a database lookup. Because the analysis runs locally in your browser and nothing is uploaded, you can find the BPM and key of a private demo, a rough bounce, a sample pack file, or any track that no online database has ever indexed. It reads the audio itself, not a catalog entry.
Tempo is ambiguous by nature, a track at 140 BPM can be counted just as correctly at 70 BPM, since one is simply double time of the other. When a result feels off, it is almost always this half time or double time relationship, so just halve or double the number to land on the count that matches how you feel the beat. Genres like drum and bass and trap are especially prone to being read at half or double their common tempo.
There is no single right answer, but there are common ranges. Trap and a lot of modern hip hop sit around 130 to 150 BPM, often counted in half time near 65 to 75, pop tends to land between 100 and 130 BPM, and house is usually near 120 to 128, with minor keys popular across all of them for a darker feel. Use this tool on reference tracks you like to see the exact tempo and key they use, then aim your own production into the same zone.
The confidence read reflects how clearly the track points at a single key. A song that stays in one tonal center with strong chords reads as high confidence, while something atonal, heavily processed, very short, or drifting between keys reads lower. A low confidence key is still a useful best guess, it is just a signal to double check by ear before you commit to it for mixing or transposing.
No. There is nothing to download, no extension, and no sign in. Open the page, drop in a file or tap the tempo, and you have the BPM and key. Everything runs in the browser tab you already have open.
You found the tempo and the key of a track you love. Turn that same energy into an original song of your own with the AI music generator, free to start.
Free to start, no credit card required