Format CSS with parser-aware strings, comments and nested rules while retaining declaration order, with local processing and clear error recovery.
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Make a stylesheet readable while retaining declaration order, fallback sequences and token boundaries that affect the cascade.
Format CSS without changing fallback or declaration order.
Format duplicate declarations, media queries and nesting, then compare sequence and copy output.
Readable rules retain ordering and do not claim compatibility or optimization.
Protect token boundaries inside content, URLs and custom properties.
Challenge braces/semicolons in strings, data URLs, calc spacing and malformed rules, then correct and rerun.
Strings remain intact, parser failures are explicit and no partial stylesheet appears.
Complete formatting and error recovery without hover-only controls.
Load the example, select tabs/four spaces, submit from keyboard and copy the current result on mobile.
Named 44-pixel controls and stacked editors expose a readable result without horizontal page overflow.
Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.
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Prettier 3.9.6 uses the CSS/PostCSS parser. Strings, URL tokens, comments and nested blocks are handled by the parser; declaration and rule order are retained.
An explicit run loads the language engine in a disposable worker. Cancellation and a wall-clock timeout prevent abandoned work from updating results. Input code is never executed.
Input or option changes invalidate old output. Copy/download contain code only, not an appended report. Formatting is not automatic repair or runtime validation.
Updated: August 2026
Format a content string containing semicolons and braces, then verify that its internal spaces and punctuation remain intact.
Compare repeated display/color declarations and vendor fallbacks in their original order before applying styles.
Load an example, recover from an unclosed rule, choose indentation and copy the current stylesheet from stacked editors.
Format CSS rules with Prettier, then review the cascade and render in your own app. This tool does not alphabetize properties, remove comments, minify styles or calculate browser support.