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Free music tools: metronome, tuner, tones and piano

Keep time with a metronome that never drifts, tap a tempo or find a song's tempo from its sound, tune a guitar, ukulele, bass or violin by microphone, play test tones and sweeps, and play a piano that shows and names chords, all on your device.

No account, no limits on use, and your files never leave your device: each tool runs in the browser.

The tools

Metronome

A metronome that keeps exact time on the audio clock, with tap tempo and a song's tempo found from its sound, on your device.

Tuner

Tune a guitar, ukulele, bass, violin or anything else with your microphone: the note, cents sharp or flat and the string to turn.

Tone generator

Play a tone at any frequency, sweeps and up to three tones at once, left or right, and check the highest tone you can hear.

Piano and chords

Play a piano with your keys, mouse or touch, see any chord's notes and find the chord your notes make.

How to, step by step

How does an online metronome keep accurate time?
Why a web metronome can drift, how this one keeps exact time on the audio clock, and what your speakers add that no page can see.
How do I use a metronome to practise?
How to set the tempo, the beats in a bar and the clicks between beats, and how to practise with a metronome from slow to fast.
How do I find the BPM of a song by tapping?
Tap along to a song and its tempo is worked out from the middle gap of your taps, so one tap out of place does not throw the answer.
How do I find the BPM of a song?
A song's tempo found from its sound on your device: how sudden rises in loudness give the beat, and why half or double can also be right.
How does an online tuner work?
How the tuner hears a note through your microphone, what cents mean, and why one string at a time works best, with nothing recorded or sent.
How do I tune a guitar?
How to tune a guitar (E A D G B E, low to high) with your microphone, one string at a time, and what the page means by sharp, flat and cents.
How do I tune a ukulele?
How to tune a ukulele (G C E A, with the G high) with your microphone, one string at a time, and what the page means by sharp, flat and cents.
How do I tune a bass?
How to tune a bass (E A D G, or B E A D G on a five-string) with your microphone, one string at a time, and what the page means by sharp, flat and cents.
How do I tune a violin?
How to tune a violin (G D A E, in fifths) with your microphone, one string at a time, and what the page means by sharp, flat and cents.
What is a chromatic tuner?
A chromatic tuner names the nearest of all twelve notes to any sound and how many cents off it is, with A4 set from 415 to 466 Hz.
How do I generate a tone at a frequency online?
Steady tones, sweeps and a check of the highest tone you can hear, all made by your browser, with what to watch for in volume.
Which test tone frequency should I use?
What sine, square, triangle and saw waves sound like, which frequencies are useful for tests, and why to start quiet.
How do I test speakers with a frequency sweep?
A sweep glides through every frequency so rattles, booms and dips show themselves; how to set one, and by octaves or in a straight line.
What is the highest frequency I can hear?
A rising tone shows the highest you can hear on this device; why that is not a hearing test, and when to see an audiologist.
Can I play the piano online for free?
Play a three-octave piano with keys, mouse or touch, see any chord's notes, and find the chord your notes make, with nothing to install.
How do I play piano with my computer keyboard?
Which computer keys play which notes, how to move an octave, and what the browser's piano sound is made of.
How do I play chords on the piano?
Major, minor, seventh and other chords built from their intervals, shown on the keys and played, for any of the twelve roots.
What chord is this? How to identify a chord
Press the notes you hear or play and the chord they make is named, with other names it could have, by the tonal library's chord detection.