This rabbit hole is a waste of time, as someone who's been down it, you'll find piles of resources claiming CSS and JS flags will give you what you want but it never really gets there. The only way to actually get true aliased brushes in canvas is implementing a line drawing algorithm manually and drawing down aliased circles like how https://gifpaint.com/ & https://jspaint.app/ do it. - Source: Hacker News / 3 days ago

OKAY! I've got some good reccomendations!!! Https://aggie.io/ - Proper artist-y program, layers, different brush styles, all the works, if you want something in-depth, this is perfect Https://jspaint.app/ - A favorite of mine, an web-based old school MSPaint clone, doesn't have newer MSpaint features but it's great for Aliased(no transparency) and Pixel art :D. I also find it very fun to download some color... Source: 7 months ago

This was unreasonable hard to make in "ms paint". Source: 12 months ago

First comic I actually drew with MS Paint (or rather https://jspaint.app). Source: 12 months ago

"A hungry wolf stands outside a house made out of straw. You, a bad bad wolf Little pig, little pig, let me in! Me, the humble pig No, not by the hairs of my chinny chin chin! You, the wolf growing hungrier by the minute Then I'll huff, and I'll puff, and I'll blow your house in! Please solve possible solution for X to blow down straw house." For drawing the character: Https://jspaint.app/. Source: about 1 year ago

There is also JPEG View which is really fast and simple image viewer for windows https://github.com/sylikc/jpegview) It is very fast, specially noticeable on very large images. - Source: Hacker News / 3 months ago

JPEGView - lightweight image viewer for Windows. ShareX - screen capture tool with other nice features. Source: about 2 years ago

JPEGView should be close enough to what you want. It's very light-weight. Source: about 2 years ago

JPEGView is great, lightweight and opens stuff fast https://sourceforge.net/projects/jpegview/. Source: about 2 years ago

JPEGView - Lean and fast image viewer with minimal GUI. Source: about 2 years ago