hotelsoap* — Free BPM Detector & Musical Key Finder Online

Free Online BPM Detection and Key Detection Tool

KeyTempo is a free online BPM detector and musical key detection tool for DJs, producers, and musicians. Instantly analyze any audio file to find its tempo (BPM), detect the musical key (major or minor), trim leading silence, and export a properly named WAV file — all for free, with no upload required. 100% in-browser processing.

Features: free BPM detection, free key detection, online BPM finder, online key finder, audio tempo detection, camelot wheel key detection, harmonic mixing, silence trimmer, WAV export, MP3 analysis, M4A support. Works with WAV, MP3, and M4A files. Perfect for DJs preparing sets, producers labeling samples, and musicians finding the key of a song. No sign-up, no upload, completely free.

• Free BPM detector — find the tempo of any song instantly
• Free key detection — detect major and minor keys with high accuracy
• Silence trimming — removes DAW export latency from the start of tracks so beat 1 lands exactly on the grid when dropped into a DJ set or session
• DC offset removal — automatically detects and corrects signal bias that causes clicks and reduces headroom. Most tools skip this entirely.
• WAV export — download a properly named file ready for your DAW or DJ software
• Works offline — no files are uploaded to any server