Drag & drop a .css file here, or click to upload
🔑 Key Features & Benefits
- Detect duplicate CSS rules and selectors for cleaner code.
- Remove redundant declarations to reduce stylesheet size and complexity.
- Improve maintainability — fewer duplicates means easier edits and fewer conflicts.
- Performance edge — smaller CSS means slightly faster loading and lower bandwidth usage.
- Privacy-first: all processing happens in your browser; your CSS is not stored remotely.
📌 Use Cases
- Front-end developers cleaning large legacy stylesheets full of duplicate rules.
- Teams wanting to standardise CSS across large projects and avoid redundant definitions.
- Web performance engineers optimising CSS payload for faster page loads.
- Students or trainees learning CSS best practices — spotting duplicate rules before they become messy.
❓ Frequently Asked Questions (FAQs)
- What is a duplicate CSS rule?
A duplicate CSS rule is a selector or declaration that appears more than once in a stylesheet, often causing redundancy or conflicting behaviour. - Will removing duplicates break my styles?
Generally not — duplicates often serve no unique purpose, but always test after cleaning large stylesheets. - Is this tool free?
Yes — the CSS Duplicate Finder is free to use without registration. - Can I import or upload a CSS file?
You can paste your CSS directly. File upload support depends on your implementation preference.
