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DevBench
Formatter & converter hub

Code Beautify

Beautify HTML, CSS, JavaScript, Python-style indents, SQL, and more below — then browse validators and converters in the catalog.

Everything runs in your browser on DevBench — no uploads.

Online beautifier

Format HTML, CSS, SCSS, Less, JavaScript, TypeScript, TSX, JSON, Markdown, YAML, GraphQL, XML, and SQL with Prettier / sql-formatter. Python uses indent normalization (4 spaces per depth).

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Online code formatter — Prettier in the browser

The DevBench Code Beautify workspace runs Prettier entirely in your browser to format HTML, CSS, JavaScript, TypeScript, TSX, JSON, Markdown, YAML, and GraphQL. For SQL it uses the sql-formatter library. No code is sent to a server — paste your messy code, click format, and get clean, consistently-indented output in seconds.

Supported languages

Why use a code formatter?

Consistent formatting removes style debates from code reviews, makes diffs cleaner (one logical change = one diff hunk), and makes AI- or tool-generated code immediately readable. Prettier enforces an opinionated style so teams don't have to maintain manual style guides.