HTML Formatter & Minifier
HTML Formatter & Minifier format html code online private pretty print html markup minify html without uploadTurn dense markup into reviewable source
Paste an HTML document or fragment and choose Format HTML for consistent indentation. Choose Minify for conservative removal of comments and whitespace between tags.
Formatting exposes document structure
Indentation makes parent-child relationships, repeated components, attributes, templates, and misplaced closing tags easier to notice. The formatter understands normal HTML syntax and embedded content better than a simple tag-splitting expression. It does not replace browser testing or standards validation.
Worked example
Paste <main><h1>Catalog</h1><ul><li>Maple</li></ul></main>. Formatted output places the heading, list, and item on indented lines beneath the main element. That makes a missing closing tag or incorrectly nested section easier to find during review.
Minification is intentionally conservative
The minifier removes ordinary comments and spacing between tags. It does not rewrite inline CSS or JavaScript, collapse every text-space sequence, shorten attributes, or optimize templates. HTML whitespace can affect inline layout, preformatted text, emails, and framework templates, so aggressive transformations require a build tool configured for the exact project.
Syntax and browser repair differ
Browsers recover from common malformed structures, including a block element placed inside a paragraph. When strict formatting rejects input but the browser can construct a document, this tool formats or minifies that repaired structure and shows a warning. Repaired output is usable HTML, but it is not proof the source was valid and implied closing tags can move elements. Review the result, browser console, heading order, labels, and relevant validator output.
Privacy and limitations
Markup stays in this browser tab. The tool does not load linked resources, execute scripts, preview the document, sanitize source, validate accessibility, or check HTML against a specification. Do not treat formatted output as safe user-generated HTML; use a dedicated sanitizer before inserting untrusted markup into a live page.
HTML Formatter FAQ
Does formatting change what users see?
Usually not, but whitespace-sensitive content and templates need careful review.
Is minified output sanitized?
No. Minification changes layout, not security.
Does this validate accessibility?
No. Accessibility requires semantic and rendered-behavior testing.