A logo showing a blue circle
Vlad-Stefan Harbuz
A screenshot of vegvisir


When writing music, I often felt the need to look up the notes in a more complex chord, or the notes in a certain mode, and so on. If you’re a seasoned composer, you should probably know these things off by heart, but I found it useful to have a small tool to remind me of these things.

vegvisir is a web application that can calculate various music theory concepts for you, such as the name of a chord from its notes, a key signature from its sharps/flats, the notes in a chord, the intervals of a chord type, and the notes in a scale or mode.

I’ve spoken to a few people who have used it and found it useful, so I’m publicly maintaining it.