Relic CSS
Finds browser hacks and older patterns that may no longer be needed so you can modernise with confidence, not guesswork.
Open Relic CSSWhat is ReliCSS?
ReliCSS came out of the same thing I keep running into on client work: old codebases full of context, history, and the occasional CSS fossil.
I wanted a practical way to answer three questions quickly: what legacy browser hacks can go, what repeated values should probably be tokens, and where duplicate declarations are adding noise.
Everything runs in the browser. Paste CSS, upload a file, or fetch a URL and work through the output. Nothing is sent to a server.
ReliCSS Tools
Can I Re-Use
Spots repeated hardcoded values and flags likely candidates for custom properties.
Open Can I Re-UseCSS De-Dupe
Highlights duplicate declarations in selectors so you can trim repetition and reduce maintenance overhead.
Open CSS De-DupeFossil Tokeniser
Converts CSS fossils (legacy custom properties) into modern design tokens JSON following DTCG standards.
Open Fossil TokeniserCode Scrolls
Quick JavaScript tools for web development: toggle JS states, inspect inline CSS, detect third-party resources.
View Code Scrolls