Tip: press Ctrl + Enter to format. Everything runs in your browser.
Ready to format
Paste HTML and click Format HTML// format messy html into clean readable markup
Format messy HTML into clean, readable markup with indentation controls, tag cleanup, copy support, and fast browser-based beautification.
Ready to format
Paste HTML and click Format HTMLAdd minified, messy, or copied HTML into the input editor.
Pick 2 or 4 spaces and optionally wrap long attributes.
Review readable markup, then copy or download the cleaned file.
HTML Formatter turns compact or inconsistent markup into structured, indented HTML that is easier to read, debug, and maintain.
No. The main formatter runs in your browser. The PHP API fallback is included for compatibility, but the UI does not need to send your markup anywhere.
It can make messy HTML easier to read, but it is not a full standards validator. Use an HTML validator after formatting if you need syntax-level checks.
Yes. HTML comments are kept and placed on their own readable lines during formatting.
Yes. Paste one-line or minified HTML and the tool will split tags and text into a cleaner indented structure.
Two spaces are common for frontend projects, while four spaces may be easier to read in long nested templates.
Yes, it is designed for the same workflow: converting hard-to-read HTML into clean, readable markup for editing and review.
An HTML Formatter is a developer utility that takes compact, minified, or inconsistently spaced HTML and converts it into readable markup. Instead of manually adding line breaks and indentation, you can paste a snippet into the tool and get a cleaner structure in seconds. This is especially useful when working with copied website markup, exported templates, email HTML, CMS blocks, or production output that has been compressed for performance.
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Readable HTML makes debugging faster. When tags are aligned and nested clearly, it is easier to spot missing closing tags, misplaced containers, broken attributes, duplicated sections, or unnecessary wrapper elements. Clean formatting also helps when comparing versions in Git, reviewing pull requests, or handing code to another developer. A single-line block of markup may work in the browser, but it is difficult to maintain when you need to edit it later.
This formatter tokenizes HTML tags and text, then applies indentation based on nesting depth. Opening tags increase indentation, closing tags reduce it, and void elements such as <br>, <img>, <meta>, and <input> stay on the current level. Comments and doctype declarations are preserved so the output remains useful for real-world snippets. The optional attribute wrapping mode can also split long tag attributes onto separate lines, which helps when working with complex components or generated markup.
Formatting is only one part of HTML quality. After beautifying markup, scan the output for meaningful structure. Use semantic elements like <main>, <section>, <article>, <nav>, and <footer> where appropriate. Make sure images have useful alt text, form inputs have labels, buttons have clear text, and headings follow a logical order. Clean indentation helps you see those issues faster, but accessibility and semantics still need human review.
Minified HTML removes extra whitespace to reduce file size. That is good for delivery, but not good for editing. If you receive a minified template or copy a block from a production page, formatting it first gives you a readable working version. Once editing is complete, you can minify it again before shipping if your deployment pipeline does not already handle compression.
Use this tool when you need to inspect a widget embed, clean up a landing page section, review an HTML email, reformat CMS content, or prepare code for documentation. It is also useful when learning HTML because it makes nesting visible. Seeing each tag on a separate line makes parent-child relationships easier to understand and reduces the chance of editing the wrong part of a layout.
The formatter is designed to run locally in your browser, so it is fast and convenient for day-to-day development. You can paste markup, choose indentation, format, copy the result, or download it as an HTML file. For sensitive projects, browser-side tooling is helpful because you do not need to depend on an external remote processor for simple formatting work.