Free tools for musicians

Tuner, metronome, tone generator and more — right in your browser, no accounts or downloads. Each tool does one thing well.

Detects the note and cents of deviation using your microphone.

Precise tempo from 30 to 300 BPM, with a downbeat accent.

Tap the spacebar along with the beat to get the tempo.

Pure tones from 20 Hz to 20,000 Hz in multiple waveforms.

White, pink and brown noise, with a timer.

Change a recording's speed without altering its pitch.

Turn a recording into real MIDI notes using artificial intelligence.

Practice intervals and chords by ear with score tracking.

Keys, relative minors and key signatures.

Shift a chord progression up or down by semitones.

Split royalty percentages between collaborators.

If HertzKit was useful to you, you can buy us a coffee. It's never required to use any tool.