Skeletune

Tuner

Chromatic tuner with cent offset, reference pitch and instrument presets.

Tuning plate

Controls are visual only; no microphone is opened in this kit.

Pitch trace

-50
-25
0
25
50
-8

Reading

Note

A

Cents

-8¢

Frequency

438.0Hz

Target

440.0Hz

Instrument

guitar

Status

near

Pitch trace

Tuner settings

Reference

440 Hz

Instrument

guitar

Mode

chromatic

Reference pitch and preset controls are static mock settings.

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Stems notice

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Share result

Share result
skeletune.app/r/tuner-a438

Export plate

Skeletune

Specimen plate

2026-08-25

visual preview

Tuner

Tuner

Note
A
Cents
-8¢
Frequency
438.0Hz
Target
440.0Hz
Instrument
guitar
Status
near

Print-styled preview only. No PDF is generated in this design kit.

About this tool

Tuner reads the note you play, its cent offset and its frequency against a reference target, on a printed-gauge surface.

Pitch detection runs in your browser and the microphone opens only after you start the tuner. Nothing is uploaded and no account is needed.

How it works

  1. 01

    Start the tuner

    Click listen and allow microphone access, then play a single note.

  2. 02

    Read cents

    The cent offset shows whether the note sits flat, sharp or centred.

  3. 03

    Adjust reference

    Change the reference pitch or pick an instrument preset for the strings you are tuning.

Questions

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