Click and drag to paint/erase. Click the button in the lower right corner to toggle paint/erase. It's called Nonogram Painter, rather than Nonogram Editor, because it doesn't actually verify that the produced nonogram can be solved. You can Export, and copy/paste your code into one of the many solvers online to verify. Or, just paint away. This was inspired by @RokCoder's recent project, Nonograms. Go check it out if you enjoy nonograms. All code by me (@kriblo).
