A musician's pocket toolkit.

Free, fast browser tools for songwriting, practicing, and the studio. No signup. Works on any device — even on a music stand.

Rhythm

3 tools

Drum Machine

16-step sequencer with 808, 909, and acoustic kits.

Metronome

Steady click with tap-tempo, time signatures, and accents.

BPM to ms

Convert tempo to delay and LFO times instantly.

Harmony

3 tools

Chord Finder

Find any chord on piano, guitar, or ukulele — and hear it.

Scale Explorer

Visualize and hear any scale — modes, pentatonics, exotic.

Circle of Fifths

Interactive chart for keys, chords, and modulations.

Tuning & Pitch

3 tools

Chromatic Tuner

Tune any instrument with your mic — accurate to ±1¢.

Tone Generator

Sine, square, sawtooth — 20 Hz to 20 kHz, with presets.

Transposition

Change keys instantly — chords, single notes, or full songs.

Practice

2 tools

Speed Trainer

A metronome that ramps tempo automatically — push your technique faster, gradually.

Ear Trainer

Test interval and chord recognition. Track your accuracy and streak.

Free forever

No signup, no paywalls, no upsells. Built to stay free.

Fast on any device

Works on phones, tablets, laptops. Even on a music stand.

Privacy-first

Audio is processed locally. Nothing leaves your browser.

From the blog

What is BPM, and why does it matter?

A short, plain-English explainer covering tempo, time signatures, and how producers find the BPM of any song.

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