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HertzKit is a free online platform offering 40 music and audio tools for musicians, producers, singers, songwriters and music learners. Tune instruments, analyze audio, measure BPM and loudness (LUFS), edit recordings, work with MIDI, explore chords and scales, train your ear, create musical ideas and improve your practice workflow.
Features include an online tuner, metronome, audio analyzer, vocal and instrumental separation, MIDI tools, chord progressions, music theory calculators, audio editing, WAV and MP3 conversion, and much more.
Most tools run directly in your browser without installing software. Audio processing is designed to happen locally on your device. Free account features are available for selected tools.
HertzKit makes music creation, learning and audio production more accessible through practical, easy-to-use online tools.
Features
- Free online music and audio tools
- Online instrument tuner and pitch detection
- Metronome and BPM counter
- Audio analyzer and spectrogram
- LUFS loudness meter
- Audio editor and audio converter
- Vocal and instrumental separation
- MIDI viewer, editor and transposer
- AI audio-to-MIDI transcription
- MIDI to sheet music
- Chord and scale finder
- Music theory and ear training tools
- Chord progression generator
- Audio recording and comparison
- WAV and MP3 processing
- Browser-based tools, no installation required
Project Samples
