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Why Use Our BPM & Key Finder?
Instant BPM Detection
Find the tempo of any song in seconds. Our BPM finder analyzes your audio and detects the exact beats per minute.
Accurate Key Detection
Detect the musical key and scale of any song. Perfect for harmonic mixing and music production.
100% Private & Free
Your files never leave your browser. All analysis happens locally on your device. No uploads, no signups.
Frequently Asked Questions
How do I find the BPM of a song?
Simply upload your audio file (MP3, WAV, FLAC, etc.) to our BPM finder and we will instantly detect the tempo. The analysis runs entirely in your browser using advanced audio processing algorithms.
How accurate is the key detection?
Our key finder uses the Krumhansl-Schmuckler algorithm, a proven method for musical key detection. Accuracy is typically 85-95% depending on the complexity of the song.
What audio formats are supported?
We support all major audio formats including MP3, WAV, FLAC, OGG, M4A, and even video files like MP4, WebM, and MOV. Maximum file size is 200MB.
Is this BPM finder really free?
Yes! Toneify is completely free to use with no limits. We do not require any signup or registration. Your files are processed locally and are never uploaded to our servers.
Can I export the detected notes as MIDI?
Yes! After analysis, you can view the detected notes in a piano roll visualization and export them as a MIDI file. Perfect for sampling, remixing, or learning songs.