Code Formatter
Auto-formats source code across 15+ languages — JavaScript, Python, HTML, CSS, SQL, YAML — with language-aware indentation and syntax rules.
How to Use the Code Formatter
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YAML Validator
Validate YAML formatting, detect indentation issues, convert YAML to JSON, and minify YAML comments. Code never leaves your device — formatting and validation run locally in your browser.
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Frequently Asked Questions
How does auto-detect work?
Syntax signatures route each snippet: braces with function keywords go JS, selectors go CSS, tags go HTML. Mixed pastes split by detected blocks.
When to use language-specific tools?
For full files and strict configs — this tool optimizes pastes and snippets. Thousand-line sources deserve their dedicated formatter.
Does it validate too?
Basic syntax sanity inline (unbalanced braces flagged); deep validation belongs to linters. Formatting never hides real errors.
Do snippets upload anywhere?
No — formatting runs locally in your browser. Code never leaves your device.
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Beautify or minify HTML, CSS, JavaScript, XML, ERB, LESS, and SCSS with a single click. HTML, CSS, JS, XML, and more normalize in one pass — local processing, free, no signup.
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Pretty-prints raw JSON with configurable indent width, key sorting, and bracket collapsing options while flagging syntax errors with exact.
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Last updated October 2026