Free BPM and Key Finder for Any Song
Accurate online BPM detector and song key finder for MP3, WAV, FLAC, loops, and acapellas. No upload required because everything runs privately in your browser.
Analyze MP3, WAV, FLAC, and M4A files privately in your browser. Batch mode runs files one by one.
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Speed up tagging, remix prep, and audio branding workflows.
How to Use This BPM Finder and Song Key Finder
- 1
Drop your audio files into the upload zone
Drag and drop, or click to browse, one or many tracks in MP3, WAV, FLAC, M4A, AAC, or OGG. Full songs, beats, samples, drum loops, and acapellas all work — files stay on your device because nothing is uploaded to a server.You can choose multiple files at once or one at a time. The analysis results will be saved, so there is no need to clear old files.
- 2
Let the in-browser analyzer run
The page loads the engine on demand, then steps through validating, decoding, and analyzing each file. Multiple files are processed one after another and the progress bar shows which track is currently being detected.
Example output while the browser analyzes your tracks and fills the results table. - 3
Read the BPM, key, and Camelot results table
Every track is listed with title, detected BPM, musical key (with major/minor), Camelot code for harmonic mixing, duration, and a live status. Sort through the rows to plan transitions, remix prep, or sample matching.
- 4
Copy the table or export a CSV
Use Copy Table to drop a TSV block into Notion, Google Sheets, or your DAW session notes, or Export CSV to save the full batch. Clear History resets the workspace when you are done.
Frequently Asked Questions
Is this BPM and key finder really free?
Yes. The BPM finder and song key finder are 100% free with no signup, no watermark, and no daily limit on local analysis. You can analyze as many tracks as your browser can decode.
Does my audio file get uploaded to a server?
No. All detection runs locally in your browser. The audio file never leaves your device, which makes this a safe BPM and key finder for unreleased beats and client work.
Which audio formats are supported?
Any format your browser can decode, including MP3, WAV, FLAC, M4A, AAC, and OGG. Use it as an MP3 BPM finder, WAV key finder, or FLAC tempo detector for studio masters.
How accurate is the BPM and key detection?
For full songs, beats, drum loops, and steady rhythmic material accuracy is high. Tempo is reported in BPM and key is detected as a tonic plus major/minor scale. Tracks with heavy rubato, free-time intros, or modulation may need manual confirmation.
Can I analyze multiple songs at once?
Yes. Drop or select several files and they are queued and analyzed one after another in your browser. The results table shows BPM, key, Camelot code, duration, and live status for every track in the batch.
What is the Camelot code shown next to the key?
Camelot Wheel notation (for example 8A, 5B) is a DJ-friendly way to write keys. Mixing between adjacent Camelot numbers or between A and B at the same number keeps tracks in compatible keys, which is ideal for harmonic mixing and mashups.
Can I export the results to my DAW or spreadsheet?
Yes. Copy Table pastes a TSV block straight into Notion, Google Sheets, Excel, or Ableton session notes. Export CSV downloads the full batch with title, BPM, key, Camelot, and duration as one file.
Does it work for samples, loops, and acapellas?
Yes. It works as a sample BPM finder, drum loop BPM finder, and acapella key finder. Very short clips under a couple of seconds may not contain enough rhythm for reliable BPM, but key detection on vocals is usually solid.
Can I find the BPM and key of a YouTube or Spotify song?
The tool only reads local audio files, so YouTube and Spotify streams cannot be analyzed directly. Export or render the track to MP3 or WAV first, then drop it into the BPM finder.
How do I use this with FL Studio, Ableton, or Logic Pro?
Set your DAW project tempo to the detected BPM so loops snap to the grid, then use the detected key (and Camelot code) to choose compatible samples, pitch acapellas, or plan key changes in your arrangement.
Is this an AI BPM finder?
No. It uses classical digital signal processing tools — onset detection, tempo estimation, and key estimation — rather than a generative AI model. That keeps results deterministic and the engine small enough to run client-side.
How is this different from Tunebat or Mixed In Key?
TagMyBeat is a free Tunebat alternative focused on private, in-browser analysis with batch processing and one-click CSV export. There is no account, no upload, and no track limit, which makes it handy for quickly tagging a session of beats or stems.
Private Tempo and Key Detection for Producers
Use TagMyBeat as a quick BPM finder online, MP3 key finder, and tempo and key finder before building producer tags, remixing hooks, matching samples, or preparing DJ transitions. The analysis engine loads only after you choose a file, keeping the initial page lightweight.