Paste your broken CSS here and click "Fix CSS!!" to repair itEnter Invalid CSS

What is the CSS Fixer?

CSS fails silently. Drop a semicolon after color: #222, fat-finger txt-align instead of text-align, leave a stray { in front of #cart-summary, or forget to close a string in content: "Total – the browser doesn't error, it just quietly skips the rule. The fixer catches that breakage and gives you back CSS that actually parses. It's happy with real selectors like .order-row, #cart-summary, or anything else from your real codebase.

The CSS spec is maintained by the W3C CSS Working Group, with active drafts at drafts.csswg.org; MDN CSS is the day-to-day reference for what each property actually does, and web.dev's Learn CSS course is a solid refresher. Once you've got fixed CSS back, drop it into the W3C CSS Validator to double-check it, and use Can I use for browser-support sanity.

Processing happens server-side and we don't persist the input. Fix the rules, paste them back into your stylesheet, ship.

How to Use the CSS Fixer

Three steps. Each one uses the actual buttons on this page.

Paste Broken CSS or Load Sample

Drop your broken CSS into the left editor. Hit Sample CSS to load a deliberately-broken rule with the most common mistakes. Example of what the fixer handles:

.order-row {
  color: #222
  padding 12px;
}

It repairs missing semicolons, unbalanced {}, missing colons between property and value, unclosed strings, and obvious typos in property names like txt-align.

Click Fix CSS!!

Hit the green Fix CSS!! button. The fixer parses your input, identifies the syntax issues, and writes the repaired version to the right pane. A loading indicator shows while it's working.

Review Fixed Output

The right pane shows the repaired CSS. Property values stay untouched – only the syntax around them is corrected. Copy the output back into your stylesheet.

When You'd Actually Use This

Cleaning Up Legacy Stylesheets

Old stylesheets accumulate small syntax breaks – the kind your editor never warned you about because the rule above and below still parsed. Run the file through the fixer to find what your linter missed.

CSS from CMS or WYSIWYG Editors

CMS theme editors and WYSIWYG exports love to emit one too many closing braces. The fixer normalises that without you having to hunt for the extra <code>}</code>.

Pre-Build Validation

Run broken CSS through the fixer before it hits PostCSS, Sass, or your bundler – the transpiler errors get a lot less cryptic when the input was actually valid CSS to start with.

Repairing AI-Generated Snippets

LLM-generated CSS often misses a semicolon or two. Pipe the model's output through the fixer and you get CSS that actually applies in the browser instead of failing silently.

Common Questions

Is my CSS data stored?

No. Repair runs on the server but we don't persist the input. Once the response goes back to your browser, it's gone from our side.

What kinds of errors does it fix?

Missing semicolons, unbalanced braces, missing colons between property and value, unclosed strings, and obvious typos in property names – the day-to-day CSS breakage. It won't rewrite your design, only fix the syntax around it.

Does it change my property values?

Only when needed for syntax (e.g., correcting txt-align to text-align). Numeric values, colours, and string values stay as you wrote them.

Does it handle <code>@media</code> and <code>@keyframes</code>?

Yes – the fixer treats blocks inside at-rules (@media, @keyframes, @supports) the same way as top-level rule blocks. Missing braces or semicolons inside them get repaired too.

How do I confirm the fixed CSS is valid?

Run the output through a CSS validator after fixing – the W3C CSS Validator is the canonical one. You can also pair the fixer with our CSS Validator tool for a quick second-pass.

Does it work on SCSS or LESS?

The fixer targets plain CSS. For preprocessor syntax (variables, nesting, mixins) compile to CSS first using SCSS to CSS or LESS to CSS, then run the fixer if needed.

Other CSS Tools You Might Need

Fixing is just one step. Here are the other CSS tools that work well alongside it: