CSS MIGRATION LAB · BROWSER ONLY

Make your existing CSS brand-ready.

Find hardcoded colors, spot near-duplicates, assign meaningful design roles and download a reviewable migration. Your stylesheets stay in your browser—the originals are never overwritten.

Analyze your stylesheets Create a brand theme first

Explore color impact and brand drift → Preview your reviewed migration on static HTML → Your files stay local Every replacement is opt-in Export usable CSS + report No accounts or APIs

01 / IMPORT

Start with your existing website

Choose .css files or a .zip containing stylesheets. ZIP imports inspect CSS files only; other assets are ignored.

Drop CSS files or a website ZIP hereOr click to browse · Up to 48 CSS files · 6 MB CSS · 12 MB ZIP

WHAT THIS TOOL DOES — AND DOESN'T

A migration assistant, not an automatic redesign

01 / Understand

Inspect CSS files, count literal opaque colors and surface likely responsibilities using selectors and properties.

02 / Decide

Confirm or change suggested semantic roles, and decide whether to preserve originals or map to your brand system.

03 / Implement

Review the diff, export tokenized CSS and integrate the downloaded copies only after testing in your own project.

This is a static CSS inspection: it cannot reliably infer every design intent, resolve imported stylesheets, execute CSS, inspect DOM usage, calculate contrast on unknown backgrounds or transform arbitrary live websites. Alpha/translucent and advanced color functions may be left unchanged. ZIP import supports standard stored/deflate ZIPs with UTF-8 CSS filenames; it does not run scripts or import JavaScript. Review every change and confirm real-browser behavior before deployment.