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Free Key Finder Online
Upload a track and find its musical key in seconds.
Key Finder
Drop one track or a whole batch — get the key, BPM and Camelot code of each, then export to CSV.
Drop your audio here
Drag and drop, or click to select · Beats, loops, full tracks
Supports MP3, WAV, M4A and more · Works on desktop and mobile
Analysis runs locally in your browser — your files are never uploaded.
Discover more
Core tools
How to Find the Key of a Song in 3 Simple Steps
Upload one track or a whole batch, let Devoice work out the key of each, then export the list to CSV.
Upload your audio
Click the upload button or drag and drop one song, or many at once. Beats, loops, full tracks, and recordings all work. MP3, WAV, M4A and other common audio formats are supported.
Let Devoice analyze it
Our AI listens to each track and works out its most likely musical key. Most files take only a few seconds, and batches are processed in one go.
Review and export
See the detected key for every file, such as A minor or F major, with its major or minor mode. Then download all results as a CSV file to sort, filter, and share in your favorite spreadsheet app.
Why Use Devoice Key Finder
Detect the key by ear or let Devoice do it in seconds — then organize a whole library in one run.
Find the Key of Any Song in Seconds
Guessing a song's key by ear takes practice and time. Devoice Key Finder does the work for you. Upload a full song, a beat, a sample, or a vocal take, and get a clear answer showing the root note and whether it is major or minor. No music theory degree needed.
Analyze Whole Libraries in Batch and Export to CSV
Checking tracks one by one is slow when you have a full crate, playlist, or sample folder. Upload multiple files at once and Devoice detects the key of each one in a single run. When it's done, export the results to a CSV file and open it in Excel, Google Sheets, or Numbers. Sort by key, group compatible tracks, and keep a clean record of your whole collection.
Built for Producers, DJs, and Singers
Knowing the key makes everything easier. DJs can group tracks that mix well together. Producers can match samples, basslines, and melodies to a reference. Singers can check whether a song fits their range before rehearsing. And when you're ready to build, Devoice's AI tools can remove background noise or separate vocals on the same platform, so you can analyze, clean up, and create without juggling multiple apps.
DeVoice Key Finder FAQ
Everything you need to know about detecting the key of a song with Devoice.
Is Devoice Key Finder free to use?
Yes. Devoice Key Finder is completely free. You can detect the key of your songs, analyze files in batches, and export your results to CSV at no cost.
What audio formats does it support?
Can I analyze multiple songs at once?
What's included in the CSV export?
How accurate is the key detection?
What is the difference between a major and a minor key?
Can I find the key of a vocal recording or a short loop?
Are my audio files private?
Ready to Find Your Song's Key?
Upload a track, or a whole batch, and get the musical key of each in seconds. Export everything to CSV.