Free musician tools that run in your browser
A metronome, instrument tuner, tone generator, BPM tapper and note-frequency chart — 100% in your browser using the Web Audio API, with no uploads, no signup and no microphone data ever leaving your device.
Metronome
Keep time with an accurate, adjustable metronome featuring tap tempo and time signatures.
Instrument Tuner
Tune any instrument with your microphone — see the nearest note, frequency and cents offset.
Tone Generator
Generate pure sine, square, sawtooth or triangle tones at any frequency and volume.
BPM Tapper
Tap along to any song to measure its tempo in beats per minute instantly.
Note Frequency Chart
Look up the frequency of every musical note with a configurable A4 reference and play button.
Key & BPM Finder
Find a song's musical key, Camelot code and tempo from an audio file — analysed in your browser.
Virtual Piano
Play a responsive online piano with your mouse, touchscreen or computer keyboard, with sustain.
Guitar Chord Chart
See fretboard diagrams for any guitar chord in standard tuning, with notes, intervals and strum.
Scale Finder
Show the notes, intervals and chords of any scale or mode on a piano and guitar fretboard.
Circle of Fifths
Interactive circle of fifths with key signatures, relative minors and diatonic chords.
Practice tools that run entirely in your browser
Every tool on Music Tools runs on your device using the Web Audio API. There are no uploads, no accounts and no recordings sent anywhere. The instrument tuner reads your microphone only while you use it, and the audio never leaves your computer — which makes everything instant and completely private.
Need to keep steady time, tune a guitar or violin, generate a reference tone, find a song's tempo or look up a note's frequency? Pick a tool above and start playing — everything works offline once the page has loaded.
For theory and practice, open the virtual piano to try out melodies with your computer keyboard, look up fingerings in the guitar chord chart, see any scale or mode on piano and fretboard with the scale finder, or explore key signatures and related keys on the interactive circle of fifths. DJs and producers can drop a track into the key & BPM finder to get its key, Camelot code and tempo without uploading anything.