I decided to try my hands at making a bit on online fun - this is a ZX Spectrum screen painter:
http://worldofpaul.com/speccyart

Currently you can draw with various sized brushes, and fill areas with colours/patterns. The usual two colours per 8x8 block is enforced, so you have to be careful how you use them.

You can output a PNG of your work, or save it form reopening later. The .tap file it creates for saving will also load in an emulator (I’ve been testing against Fuse), and by extension a real Spectrum should you have the means to turn a .tap file into an audio file.

I have other ideas of what to add/try with this, and those will be added in the future. It‘s all written in JavaScript (so can be a bit laggy - believe me, it was much slower when Ib started), and the whole thing processes locally on your machine - so no pesky trips to the server for help.

Have fun and share your work if you give it a go!

Wow. That's amazing. The colours take me back to my childhood.

An update - I’ve put in some more tools - you can draw ellipses, rectangles and lines. There is also a pixel twiddling/zoom tool, and a tracing layer. The tracing layer lets you import an image and use that as a guide for your artwork.

Onwards.