↓ a few tools already do this. Each one misses something.
A wide accessibility kit. Fonts, text-to-speech, overlays, OCR, rulers, in every browser.
The trade-offBuilt to do a lot, which means more to learn. The full feature set is behind a subscription.
A simple, free font swap on every page. Lightweight and open source.
The trade-offDoes one thing well. No spacing, line length, or theme controls, and it runs on every page including code editors.
A soft color gradient down each line so your eye follows to the next.
The trade-offTackles a different angle — tracking, not typography — so it pairs with these tools more than it replaces them.
Full typography control: font, weight, line height, spacing, column width, themes, and reading options.
The differenceStays off on sites where restyling would make things worse, instead of running everywhere by default.