Alternatives to Stylebot
Changes how a website looks without writing CSS. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Stylebot
Changes how a website looks without writing CSS.
Replacements
Listings that take over the same core job as Stylebot.
Stylus
Applies custom CSS user styles to any website.
Stylus applies custom CSS per site with a built-in editor and community styles under GPL-3.0, but writing your own styles requires CSS knowledge rather than point-and-click.
Also worth comparing
These listings name Stylebot as their own alternative, so the relationship runs both ways.
Font Changer
Browser extension that lets you change the fonts used on any webpage.
Stylebot offers point-and-click restyling of fonts, colours and layout, is MIT open source, and syncs styles through the browser's own sync.
Similar software
Related functionality, not a direct replacement.
Dark Reader
Generates a dark theme for every website, on the fly.
VisBug
Point-and-click editing tools for any live web page.
Tampermonkey
Userscript manager for running custom scripts on websites.
Violentmonkey
Open-source userscript manager with cloud backup.
High Contrast
Browser extension that boosts page contrast for easier reading.