Chord Notepad: I'll just build it myself
July 3, 2026 · ProgrammingRecently, I’ve been trying my hand at songwriting. I had the lyrics down and a vague sense of the chords, and I wanted to hear how a few different progressions sounded without stopping to pick up a guitar every thirty seconds. I remembered there used to be one of those “chord transposing” websites which had exactly this feature I was looking for: being able to type a chord, then clicking it to hear it back. Because I couldn’t find it anymore, I just decided to write it myself… “It would only take like a weekend or 2”.
6 months later, here we are: the first official public release of Chord Notepad.
What is it?
Chord Notepad is a text editor in which you write your lyrics with chord symbols on the line above them, the way you typically find chords written online:
C C/E F C
Twinkle, twinkle, little star,
Dm Am G C
How I wonder what you are!
As you type, it recognises the chords and turns them into links. Click any chord and you will hear it.
But wait, there’s more! you can press play and it runs through the whole song at a tempo and time signature of your choice, lighting up each chord as it goes.
There are a ton of features which make the application far more useful:
- You can set chord durations using
Am*2syntax (to play for 2 beats) - Directives allow you to change tempo
{bpm: 90}, time signature{time: 3/4}and key{key: F#}dynamically - Loops so you can repeat sections using
{label: chorus}and{loop: chorus}. - European/solfège notation support (using
Do Re Miinstead ofC D E) - Relative notation support which plays chords relative to the currently set key (e.g.
I viio vi V). - Customizable voicing system which can play chords realistically on fret-based instruments, piano and ensembles
- Visualizing the chords in one of several modes