Formatting HTML...
Paste HTML above and click Beautify, Minify, or Check HTML.
HTML formatter for readable markup
An HTML beautifier turns compressed or messy markup into a readable structure with predictable indentation. This makes nested sections, forms, tables, metadata, and component snippets easier to review before they go into a CMS, template, or production codebase.
Beautify vs minify
Beautifying HTML adds line breaks and indentation so developers can inspect structure. Minifying HTML removes safe whitespace between tags to reduce output size. Text content, attribute values, and raw-text blocks such as pre, code, textarea, and script are handled conservatively so the formatter does not rewrite meaning by accident.
Why this tool escapes your HTML
The formatted result is displayed as code, not as live page content. Submitted HTML is escaped before syntax colors are added, which keeps scripts, event handlers, and markup from executing inside the page.
Diagnostics are practical checks
The checker reports common structural issues such as mismatched tags, duplicate attributes, unclosed tags, inline event handlers, and javascript: URLs. It is useful during development, but browser parsing and formal validation can differ, so complex documents should still be checked with official validators when standards compliance matters.
Related developer tools
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Authoritative references
HTML Beautifier FAQ
Does this tool execute pasted HTML?
No. The output is escaped and shown as highlighted code. It is never previewed or injected as live markup.
Can it format CSS and JavaScript inside HTML?
It preserves style and script blocks, but it does not beautify CSS or JavaScript syntax. Use a dedicated formatter for those languages.
Is this a full HTML validator?
No. It provides lightweight diagnostics for common mistakes. Formal standards validation should be done with a dedicated validator.