Perfbored

A simple perfboard editor that runs in the browser. You drop parts onto a 2.54 mm hole grid, run wires between them on either side of the board, and it tells you what is actually connected, so you know before burning your fingers with a soldering iron.

It is written in TypeScript and React, it stores your boards in the browser rather than on a server, and it is not a PCB tool, nor is it meant to be.