Fretboard Note Finder

What this generator does

Picks a note and finds every fret on every string that sounds it, within the range you set, for the tuning you choose — including bass and ukulele tunings, which work by exactly the same arithmetic.

How to use this tool

1. Choose a tuning and how far up the neck to look.
2. Generate a note and find it yourself before reading the answer.
3. Notice the twelve-fret gap: every position repeats an octave higher.
4. Switch to an altered tuning and watch the whole map shift.

Understanding the controls

Tuning

Standard, Drop D, Open G, DADGAD, four-string bass or ukulele. Nothing is stored per tuning; the positions are counted from whatever the open strings are.

How many frets

Between 1 and 15. Past twelve, every note repeats what was found an octave lower — which is worth seeing rather than being told.

Seed

Any word reproduces exactly the same note, which is useful for practising the same one over several sessions.

Common use cases

• Learning where notes sit in standard or altered tunings
• Finding every position of a note for a solo or a voicing
• Practising fretboard recall with a random prompt
• Working out an unfamiliar tuning without a new chart
• Setting the same practice note twice from a seed

How this generator works

A fret is a semitone and an octave is twelve of them, so the note at a given fret is the open string transposed by that many steps, wrapping round the twelve note names. The check re-derives every position the same way and separately confirms none was missed, so the list is both correct and complete.

Randomness and fairness

Which note you are asked to find is random; where it sits is fixed by the tuning. A seed reproduces the same note exactly and is therefore explicitly not cryptographically secure. Without a seed the browser's cryptographically secure generator is used.

For how randomness is produced across the whole site, see how Generate Random works.

Limitations and good to know

• Sharps only in the note names — no distinction between F sharp and G flat, which matters for spelling a key but not for finding a fret.
• Six common tunings rather than arbitrary ones.
• Positions only, with nothing about which are practical to reach in a given hand position.
• No octave numbering, so a note found on two strings is named identically even at different pitches.
• Prompts are not stored between visits; seed one you want again.

Privacy and your data

The fretboard arithmetic runs in your browser. Nothing about it or your seed is transmitted or kept.