BPM & Key Detector
Estimate the tempo (BPM) and musical key of a song or loop. Estimates only: best for steady-tempo music with clear beats. Free, fast, no sign-up required.
How to use BPM & Key Detector
- Open the tool at the top of this page.
- Upload your file or enter your text/data.
- Click the action button and download your result instantly — no sign-up needed.
About BPM & Key Detector
Category: Audio Tools. Estimate the tempo (BPM) and musical key of a song or loop. Estimates only: best for steady-tempo music with clear beats. No account or installation required. Works on any device — Windows, Mac, Android, iPhone.
Free limit: 40 MB per file · Premium limit: 500 MB per file · Files auto-deleted in 1 hour.
Frequently Asked Questions
Where is my audio processed?
Audio tools run on Toolysite cloud servers. Your file is auto-deleted within 1 hour.
Which formats are supported?
MP3, AAC, OGG, FLAC, WAV, M4A and Opus.
What is the free upload limit?
Free users can upload up to 40 MB. Premium users can upload up to 500 MB per file.
Is this tool free?
Yes. Toolysite is 100% free to use. No account required.
Do I need to install anything?
No. Everything works online in your browser. No software download needed.
Is my data safe?
Yes. Your files are processed securely, never shared, and automatically deleted within 1 hour.
What is the file upload limit?
Free users can upload up to 40 MB — which is higher than most tools websites. For larger files up to 500 MB, upgrade to Premium.