About BPM Key Finder
Created by Ben , a free online tool for detecting BPM (tempo) and musical key from audio files. Built with privacy and accuracy as top priorities.
Why We Built This
As a music enthusiast and developer, I understand the frustration of uploading personal music files to unknown servers. This tool was built to provide professional-grade audio analysis while keeping your files 100% private - everything runs in your browser.
Technology & Accuracy
Powered by Essentia.js, an industry-standard audio analysis library used by music professionals worldwide. Our BPM detection algorithm works across genres from 30-300 BPM, and key detection provides both musical notation and Camelot Wheel codes for DJ mixing.
Privacy First
No file uploads, no tracking, no accounts required. All audio analysis happens locally in your browser using Web Audio API. Your music files never leave your device, and we don't store any data about your uploads.
Get in Touch
Questions or feedback? Reach out at [email protected] . This is a free tool built for the music community.
About Ben
Ben is focused on creating high-quality, privacy-first web tools for the music community. This tool combines browser-based audio processing with professional-grade analysis algorithms to provide accurate BPM and key detection without compromising user privacy.