🌐 HTML Formatter

About the HTML Formatter Tool

HTML nesting is difficult to follow without indentation. A deeply structured page rendered as one continuous line gives you no way to see which div closes where, which is exactly the information you need when debugging a layout problem or an unclosed tag.

This formatter indents elements according to their nesting depth, so the document tree becomes visible at a glance. Attributes stay on their elements, inline elements are handled sensibly, and the whole thing runs in your browser without uploading anything.

How to Use HTML Formatter

1. Paste your HTML markup into the input area.
2. Press Format to apply nesting-based indentation.
3. Review the structure and spot any misnesting.
4. Copy the formatted markup back into your file.

When to Use This Tool

• Making a minified page source readable while debugging
• Understanding the structure of an unfamiliar template
• Cleaning up markup generated by a CMS or page builder
• Finding unclosed or misnested tags by eye
• Preparing markup for documentation or a code review

Things Worth Knowing

• Formatting alters whitespace outside of content-sensitive elements only.
• Content inside

   and  is left untouched, because whitespace is significant there.</li><li>Embedded script and style blocks are indented but their internal formatting is generally preserved.</li></ul></section><section class="seo"><h2>Quick Facts</h2><table class="kft"><tbody><tr><td>Tool name</td><td>HTML Formatter</td></tr><tr><td>Category</td><td><a href="/code/">Developer Tools</a></td></tr><tr><td>Price</td><td>Free — no account, no trial, no watermark</td></tr><tr><td>Where it runs</td><td>Entirely in your browser (client-side)</td></tr><tr><td>Files uploaded</td><td>None — your data never leaves your device</td></tr><tr><td>File size limit</td><td>None imposed; limited only by device memory</td></tr><tr><td>Works offline</td><td>Yes, once the page has loaded</td></tr><tr><td>Platforms</td><td>Windows, macOS, Linux, Android, iOS</td></tr></tbody></table></section><section class="seo faq"><h2>Frequently Asked Questions</h2><details><summary>Can formatting HTML break my page?</summary><p>Rarely, but whitespace between inline elements is rendered, so adding line breaks can introduce visible gaps between things like inline-block items. Check the rendered result if your layout depends on that.</p></details><details><summary>Is content inside <pre> preserved?</summary><p>Yes. Whitespace is significant in <pre> and <textarea>, so their contents are left exactly as they are.</p></details><details><summary>Does it validate my HTML?</summary><p>No. It formats structure but does not check for errors. Use the W3C validator for conformance checking.</p></details><details><summary>How do I minify HTML again?</summary><p>The Code Minifier tool strips unnecessary whitespace from HTML, CSS, and JavaScript.</p></details></section><section class="ts"><h2>🔗 Related Developer Tools</h2><div class="rt"><a href="/code/json-to-ts/"><h4>📋→💙 JSON to TS</h4><p>Generate TS interfaces…</p></a><a href="/code/html-to-jsx/"><h4>🌐→⚛️ HTML to JSX</h4><p>Convert HTML to JSX…</p></a><a href="/code/css-formatter/"><h4>🎨 CSS Formatter</h4><p>Beautify CSS…</p></a><a href="/code/js-formatter/"><h4>📜 JS Formatter</h4><p>Format JavaScript…</p></a><a href="/code/sql-formatter/"><h4>🗄️ SQL Formatter</h4><p>Format SQL queries…</p></a><a href="/code/code-minifier/"><h4>📦 Code Minifier</h4><p>Minify HTML/CSS/JS…</p></a></div><div class="xcat"><a href="/image/">🖼️ Image Tools</a><a href="/document/">📄 Document Tools</a><a href="/data/">📊 Data Converters</a><a href="/text/">📝 Text Tools</a><a href="/unit/">📏 Unit Converters</a><a href="/utilities/">🧰 Utilities</a></div></section></main>
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