Key Detector – Musical Key & BPM Finder
Detect the musical key & BPM of any audio in your browser. Transpose YouTube in real-time. Interactive piano keyboard included.
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Instantly identify the musical key of any audio playing in your browser. Whether you're on YouTube, Spotify, SoundCloud, or any other site, Key Detector provides accurate, professional-grade audio analysis for musicians, DJs, and music students.
Using advanced Web Audio API processing and the Krumhansl-Schmuckler key-finding algorithm, this extension listens to your active tab and extracts pitch data to give you the most reliable results possible.
Core Features:
🏆 Verdict Mode: Get a definitive key result with a color-coded confidence score. Choose between 15, 30, 45, or 60-second analysis windows for maximum accuracy.
⚡ Live Analysis: Perfect for modulating tracks. Watch a real-time chromagram ring and confidence bar as the song progresses.
🔒 Intelligent Key Lock: Once a high-confidence key is detected, the extension can lock the result so you can focus on your instrument.
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