Music FX
Upload any audio file to the key BPM finder and instantly detect musical key, scale, and tempo. Our key BPM finder uses spectral analysis to identify key signatures and display scale notes.
Upload an audio file (MP3, WAV, FLAC, OGG, AAC) to detect its musical key and BPM. Our analysis engine identifies the key signature, scale, tempo, and related keys.
Drag & drop your audio file here
Upload an audio file to detect its key and BPM
Our key BPM finder extracts musical key and tempo from any audio file using two techniques. The key BPM finder transforms audio into the frequency domain, constructs a chromagram of pitch classes, and matches the distribution against major and minor profiles using the Krumhansl-Schmuckler algorithm. For BPM, the key BPM finder performs onset detection and autocorrelation to determine the dominant periodicity. Both analyses run in your browser, delivering results in seconds across all genres.
Our key BPM finder performs audio analysis to detect key, scale, BPM, and harmonic relationships from any song file.
The key BPM finder identifies whether a song is in a major or minor key, such as C Major or A Minor. Beyond the key name, the key BPM finder displays the complete scale โ all seven notes for composing or remixing.
Detects all 12 major and 12 minor keys
Shows complete scale with all seven notes
Clear visual indicator of scale quality
The key BPM finder displays harmonically compatible keys alongside your results. Essential for DJs doing harmonic mixing โ the key BPM finder shows relative, dominant, and subdominant keys for smooth transitions.
Relative, dominant, and subdominant keys
Perfect for Camelot and Open Key mixing
Find complementary keys for songwriting
The key BPM finder delivers both key and tempo from a single upload. No need for separate tools โ the key BPM finder gives you the complete picture for matching, remixing, or cataloging tracks.
Key and BPM detected simultaneously
Harmonic and rhythmic data in one view
Know how reliable each result is
The most comprehensive free key BPM finder available online for musicians, DJs, and producers.
From DJs to producers, the key BPM finder is the essential analysis tool for anyone working with music.
DJs use the key BPM finder to identify the key of every track. The key BPM finder enables harmonic transitions that sound musical rather than clashing.
Producers use the key BPM finder to detect the key of samples and loops. The key BPM finder ensures harmonic compatibility when layering elements from different sources.
Musicians use the key BPM finder to identify the key of songs they want to learn or cover. Songwriters use the key BPM finder to analyze reference tracks.
Students use the key BPM finder to analyze songs for learning. The key BPM finder helps with ear training and connecting theory to real music.
Use the key BPM finder for complete song analysis in seconds.
Common questions about using the key BPM finder to detect musical key and tempo.
Explore more free music analysis and creation tools
Found the key and BPM? Take your music further โ generate original tracks, remix, or produce with our AI music tools.