Music & Instrument Tools

Free browser-based music tools: chromatic and instrument tuners, a drift-free metronome, tap tempo, tone generator, note frequency calculator and guitar chord, capo and transposition tools.

16 tools in this category

Tuners, rhythm and guitar tools

Tuners, a metronome, tone tools and guitar theory — all running in your browser. The microphone is used only while you are tuning, nothing is recorded, and no audio ever leaves your device.

What do you want to do?

Tune an instrumentChromatic tuner for anything with a pitch Keep timeMetronome with odd time signatures Find a tempoTap along and read the BPM Play a reference noteAny frequency, four waveforms Find a guitar chordFingerings, voicings, left-handed Transpose chordsMove a progression to another key Practise your musical earIntervals, chords and scales by ear

Guitar Tuner

The one most people came for. Standard, drop D, DADGAD, open tunings and half-step down — tune by ear with reference tones, or let the microphone work out which string you played.

Open the guitar tuner

Instrument tuners

All six share one pitch engine, tuned to each instrument's range.

Chromatic tunerAny instrument, twelve notes Guitar tunerEleven tunings Bass tuner4, 5 and 6 string Ukulele tunerRe-entrant, low G, baritone Violin tunerG D A E Piano note checkerKey strip and cents

Rhythm & tempo

Timed on the Web Audio clock, so they do not drift.

Metronome20–300 BPM, practice mode Tap tempoBPM from tapping

Sound & frequency

Tone generatorSine, square, triangle, saw Note frequency calculatorNote, Hz, MIDI, cents

Guitar tools

Chord finderVoicings and fingerings Capo calculatorBoth directions Chord transposerKeeps your lyrics intact

Practice & ear training

The tools that build a skill rather than answer a question.

Scale trainerFourteen scales, five modes Ear trainingNotes, intervals, chords, scales Chord progression generatorFunctional harmony, not a shuffle

Which tool do I need?

Tuning one instrument — use its own tuner. It knows the strings, the tunings and the frequency range, so it will not mistake a rumble for a note.
Tuning something unusual — the chromatic tuner takes anything with a pitch.
Checking a note is right — the note frequency calculator gives you the number; the tone generator plays it.
Practising in time — the metronome. Use tap tempo first if you are matching a recording.
Learning a scale — the scale trainer. It shows the notes on a fretboard or a keyboard, plays them, and can listen while you play them back.
Learning to hear — ear training. Nothing else on this page builds that, and nothing else needs it more.
Writing something — the chord progression generator, then the chord finder for the shapes.

Questions

Is my microphone recorded?

No. Audio is analysed in your browser as it arrives and immediately discarded. Nothing is recorded, nothing is uploaded, and the microphone is released the moment you stop tuning or leave the page.

How accurate are the tuners?

The arithmetic is exact and the detector resolves well under a cent on a clean signal. What limits accuracy in practice is your microphone and the room. The tuner refuses to say "in tune" when the signal is unclear rather than guessing.

Why does my bass read the wrong octave on other tuners?

Because many detectors report the loudest partial, and on a bass the second harmonic is often louder than the fundamental. This one picks the true period instead, so a low B reads as a low B.

Do I need to install anything?

No. Everything runs in the browser. The tuners need microphone permission, which is asked for only when you press start.

Can I use these on a phone?

Yes. Every tool is built for a phone screen first. On iPhone, audio and microphone access both require a tap first — that is an iOS rule, not a limitation of the tools.

Can this tune my piano?

It can check individual notes, which is useful for a digital keyboard or for spotting one string that has drifted. It cannot tune an acoustic piano: that needs stretch tuning, unisons across two or three strings per note, and tools and technique. Call a technician.

All tools in this category: