This does NOT work in Firefox.

It is just a slow and buggy proof of concept, but somewhat usable already.

(Check out engineerjs.com and t-filter.engineerjs.com as well.)

No pads selected.
width mm
height mm

help

Press A or double click to add a pad.

Select a pad and start typing to change its number.

Measuring line:

  1. Select 2 or more edges.
  2. Press M.