Everyday tool
Song Key Finder from Audio — Free Local Analysis
Choose a short audio file to estimate its likely key. The audio stays on your device.
The chosen file stays in this browser and is not uploaded.
File size limit: 25 MB. Keep the clip under 3 minutes. Audio analysis uses device memory and processing.
Likely key
Other possibilities
This is an estimate, not a guaranteed key. Compare the alternatives.
No audio selected.
About this tool
Song Key Finder from Audio — Free Local Analysis made simple.
This uses a lightweight pitch-class profile, not a trained music model. Percussion, changing chords, tuning, noise and short clips can produce uncertain or incorrect estimates. It cannot identify every key reliably; compare the alternatives and use a clear musical section.
Common questions
About Song Key Finder from Audio — Free Local Analysis.
How do I use Song key finder?
Choose a short audio file to estimate its likely key. The audio stays on your device.
Is my data uploaded to a server?
No. This tool runs locally in your browser. Your input is not uploaded.