Piano Note Checker
Hear a piano note's reference tone and see its pitch.
Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.
Piano Note Checker
Scope note: reference tones only. This checker does not listen to your piano and does not detect pitch.
How to use this tool
- Enter your details in the fields above.
- Press Generate to see the result.
- Use Load sample to try the worked example, or Clear to start again.
Worked example
For C4, the frequency is 261.63 Hz and the note number is 60. Play the tone and compare the piano key by ear.
What this tool does not do / Limits
This tool plays reference tones only. It does not listen through a microphone, does not check a played note, and does not judge whether a piano key is in tune.
Frequently asked questions
Does it check the note I play?
No. It only plays the reference tone; you compare what you play by ear.
What is the note number?
The MIDI number, where middle C (C4) is 60 and each semitone adds one.
Related tools
CSV Cleaning Studio
Remove duplicates, fix missing values, standardise dates and export a clean CSV. Your file never leaves your device.
LiveChart Builder
Build charts from CSV data with aggregation, sorting and accessible colour palettes. Export as PNG or SVG.
LiveLength Converter
Convert lengths between metric and imperial units and see the full table of equivalents.
Live