wesbos/aprilFools.css

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

1274 stars · 126 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A collection of harmless prank CSS snippets that you paste into a browser's user stylesheet (Chrome's Custom.css or Firefox's userContent.css) so they apply to every website the victim visits. Effects include rotating pages upside down, spinning sites, blurring content periodically, and flipping images, with several webkit-only tweaks aimed at Chrome dev tools.

Use cases

• prank my coworker's browser on april fools
• make every website appear upside down with css
• css snippets for chrome user stylesheet
• mess with how firefox renders all websites
• harmless developer pranks and css jokes
• flip all images on every webpage using css

When to choose

• You want harmless, reversible April Fools' gags on a colleague's machine using only CSS
• You need ready-made, commented user-stylesheet snippets for Chrome and Firefox
• You want visual effects that apply globally to every site without extensions or JavaScript

When to avoid

• You need a real styling library, framework, or theme for production work
• You require browser support without user-stylesheet overrides, since modern Chrome versions have limited or removed Custom.css support
• You need anything persistent, scriptable, or genuinely functional rather than a one-day joke

Facets

plugin · maturity stable

theme animation web-development frontend web-design browser cross-platform prank april-fools css-snippets user-stylesheet custom-css chrome firefox practical-jokes copy-paste-css

Member repositories

For agents

markdown · JSON · MCP: product_card(name="wesbos/aprilFools.css")