CSS Beautifier

Paste CSS from a build artifact, an inline style block, or an old project and receive a consistently indented version with declarations separated onto their own lines. The formatter respects quoted strings, comments, brackets, and parentheses while it scans. It also checks block structure and reports an input error when opening and closing braces do not balance, helping you catch an incomplete copy before it reaches another tool.

Turn compressed stylesheets into readable code

Production CSS is often minified to reduce transfer size, which is useful for browsers but awkward for people. Selectors, declarations, media queries, and nested blocks can become one continuous line, making even a small change difficult to inspect. This beautifier restores a predictable visual structure: each opening brace starts an indented block, each declaration-ending semicolon starts a new line, and each closing brace returns to the previous indentation level. Whitespace between ordinary tokens is normalized without changing text inside quoted strings or comments. The result is especially useful when a browser inspector, build directory, email template, or third-party theme is the only available source. Instead of manually inserting line breaks and trying to count nested blocks, you receive a stable representation suitable for reading or copying into an editor. Formatting does not claim to validate every CSS feature or rewrite style decisions. It focuses on layout, preserving the submitted code while exposing its structure clearly enough for a human review.

How the formatter protects CSS values

A safe formatter must know that punctuation does not always control stylesheet structure. A semicolon inside a quoted data value is content, not the end of a declaration. Braces in a string are characters, and punctuation inside a function such as a data URL must not be treated like punctuation between properties. The formatter therefore scans the source one character at a time and tracks quoted strings, escapes, comments, parentheses, and square brackets. Structural line breaks are added only when punctuation appears outside those protected contexts. This approach keeps values such as custom labels, embedded URLs, attribute selectors, and complex functions intact while still making ordinary rule blocks readable. Comments remain attached to the surrounding source rather than being deleted. Selector commas and common combinators receive consistent spacing, which makes selector lists easier to compare during code review. The operation is deterministic: identical input always produces identical output, with no network request, clock value, random choice, or environment-dependent behavior involved.

Detect incomplete blocks before the next step

Beautification is also a useful structural check when CSS has been copied from a partial response, a browser panel, or a generated file. The scanner counts every structural opening and closing brace while ignoring brace characters that occur inside quoted strings, comments, parentheses, or brackets. If a closing brace appears before any matching opening brace, the request fails and identifies the character position. If the scan reaches the end while one or more blocks remain open, it reports how many blocks are unclosed. This validation is deliberately narrow: balanced braces do not guarantee that every property name, value, selector, or at-rule is valid according to a particular browser or CSS specification. They do guarantee that the formatter will not quietly present an obviously truncated block as a successful result. Use the output as a clean input for review, version-control comparison, documentation, or further validation. Browser use is free, while automated API formatting uses the published base price of $0.002 per request.