Free · No sign-up

BPM and Key Finder — Find the Key and BPM of Any Song

Tempo, musical key and Camelot code in seconds — analyzed privately in your browser.

Runs locally

Drop audio files to find BPM, key, and Camelot code

One track or a whole folder. MP3, WAV, FLAC, M4A, AAC, and OGG up to 50 MB — batch analysis runs locally in your browser with no server upload.

Stays on your device
Results in seconds
BPM · Key · Camelot

Why this finder

Tempo, key and Camelot — from one drop.

Drop a track below and this BPM and key finder tells you exactly what you’re working with: the tempo in beats per minute, the musical key, and the Camelot code for harmonic mixing. It runs entirely in your browser — no sign-up, nothing uploaded to a server, and it works on MP3, WAV, FLAC, M4A, AAC and OGG files.

Your file is analyzed on your device and never leaves it: 0uploads
BPM, musical key and Camelot code from a single drop: 3readings
Half-time and double-time tempo, worked out for you: ½· 2×
No account and no daily limit on analysis: ∞files

Three steps

How to find the BPM and key of a song

01
Add your track
Drag one or many files into the drop zone, or click it to browse your device.
02
Wait a few seconds
The analyzer scans the waveform for tempo and pitch content, right inside your browser.
03
Read the result
BPM, half-time and double-time tempo, musical key and Camelot notation — copy the whole table or export CSV in one click.

No account, no watermark, no upload queue. Your file never leaves your device.

Every reading

What you get from this key and BPM finder

Tempo (BPM)
The detected beats per minute, plus half-time and double-time values so you can halve or double a beat for the genre you’re working in.
Musical key
Major or minor, with the root note.
Camelot code
The 1–12 A/B notation DJs use to mix harmonically.
Confidence score
How sure the model is about the key, so you know when to trust a borderline result.
Tap tempo
Working from a stream you can’t download? Tap along and get the BPM that way.

8A mixes cleanly with 7A · 9A · 8B

The Camelot wheel

Why BPM and key matter

Tempo decides what a track can sit next to — a 128 BPM house record will not blend into a 90 BPM hip-hop set, no matter how good the mix is. Key decides whether two tracks sound like one record or a car crash: play two songs in compatible keys and the transition disappears. That’s what the Camelot wheel is for — keys that sit next to each other on the wheel share enough notes to mix cleanly, which is why every serious DJ tool reports it.

If you’re producing rather than mixing, tempo tells you what grid to work on and key tells you what your vocalist can actually sing. If you’re singing, the key of the original is the first thing you need before you transpose it.

Who it’s for

For DJs, producers and singers

DJs

Check the key and BPM of every track before you add it to a crate, then sort by Camelot code for harmonic sets.

Producers

Match a sample to your project tempo, and find out what key your loop is actually in before you fight it for an hour.

Singers & cover artists

Find the key of the original, then pitch it to where your range lives.

Content creators

Check a track’s tempo before you cut video to it.

Formats

Supported formats and accuracy

We support MP3, WAV, FLAC, M4A, AAC and OGG files up to 50 MB each. Detection is most accurate on tracks with clear percussion and a steady tempo; for classical, ambient or heavily swung music, treat the result as a starting point and use the confidence score. If you only need the tempo of something you can’t download, tap tempo gets you there without a file.

.mp3
.wav
.flac
.m4a
.aac
.ogg

Most accurate on

Clear drums and a steady tempo
Produced pop, hip-hop, house, trap
Loops, beats and acapellas

Your audio stays yours

Free, private, no sign-up.

This song key and BPM finder is free with no daily limit, and batch analysis with CSV export is included. Nothing you upload is stored, logged or used for training — analysis happens locally in your browser.

FAQ

Frequently asked questions

Tempo, keys, Camelot codes and privacy — the short answers.

What is a BPM and key finder?

A tool that analyzes an audio file and reports two numbers: its tempo in beats per minute and the musical key it’s written in. DJs and producers use it to mix and arrange tracks that fit together.

Is this BPM and key finder free to use?

Yes. Analysis is free and unlimited, with no account and no sign-up. You can drop several files at once and export the results as CSV at no cost.

Can I find the key and BPM of a song by name, instead of uploading a file?

Not yet — the finder works from the audio itself, not from a song database. Use a file you have, or play the song and use tap tempo to get the BPM by ear.

Can I get the BPM and key from a YouTube or Spotify link?

Links aren’t supported, because streams can’t be decoded in your browser. Tap along with tap tempo while the song plays for the BPM, or analyze a local copy you have the right to use.

How accurate is key detection?

It’s reliable on most produced music. Tracks with ambiguous tonality, heavy modulation or no clear harmonic center will score lower — check the confidence number under each key before you commit.

What’s the difference between BPM, tempo and the Camelot code?

BPM and tempo are the same thing measured in beats per minute. The Camelot code is a way of writing musical key so harmonic mixing becomes arithmetic — 8A mixes cleanly with 8B, 7A and 9A.

Why does the detected BPM look half-time or double-time?

Some songs can be felt at half-time or double-time, especially trap, drum and bass, or sparse loops. That’s why the half-time and double-time values are shown next to every BPM — pick the one that matches your grid or DJ software.

Can I analyze multiple songs at once?

Yes. Drop several files and they are processed one after another. Copy the table into Notion or Google Sheets, or export a CSV with title, BPM, key, Camelot code and duration.

Does my audio file get uploaded to a server?

No. Detection runs locally in your browser, so the file never leaves your device. That makes it safe for unreleased beats, client demos and private sample folders.