Minify HTML to reduce file size, or beautify minified HTML back into readable, indented code.
Yes, HTML comments (<!-- like this -->) are removed during minification, along with unnecessary whitespace between tags.
No, standard HTML minification only removes whitespace and comments — it doesn't alter tags, attributes, or content in ways that change rendering.
Whitespace inside these tags is meaningful and preserved by browsers, so exercise care when minifying HTML containing such elements.
No, both minification and beautification run entirely in your browser using JavaScript. Your markup never leaves your device.
This tool focuses on HTML structure — tags, attributes, and whitespace between them. Content inside <style> and <script> blocks is preserved as-is; use the dedicated CSS Minifier or JS Minifier separately for that embedded code.
Yes, pasting compact or server-rendered HTML into Beautify reformats it with proper indentation, making nested structure much easier to read and follow.
No, it only reformats or compresses the markup as given — it doesn't check for unclosed tags, invalid nesting, or other HTML validity issues.
This tool compresses HTML code by removing comments and unnecessary whitespace between tags to reduce file size, or reformats minified HTML back into readable, properly indented code.
Minifying HTML removes comments, extra whitespace, and line breaks between tags that exist purely for source readability but add nothing to how the page renders. Smaller HTML files transfer faster over the network, which contributes to faster initial page load — particularly noticeable for larger pages or users on slower connections. Most production web deployment pipelines minify HTML alongside CSS and JavaScript as a standard optimization step.
<!-- and -->.A small number of HTML elements — most notably <pre> and <textarea> — preserve whitespace exactly as written, since it's meaningful to their content (like code formatting or default text). This tool performs general-purpose minification aimed at typical markup; if your HTML contains these whitespace-sensitive elements with meaningful internal formatting, review the minified output carefully before using it.
Browsers collapse most whitespace between block-level HTML elements when rendering a page, meaning a line break or several spaces of indentation between two tags typically has zero visual effect on the final rendered output. This is exactly what makes HTML minification safe in the vast majority of cases — the whitespace being removed was never contributing to the page's appearance in the first place, it existed purely to make the raw source code easier for a developer to read. The exceptions are inline elements and whitespace-sensitive tags, where a stray space can sometimes affect spacing between inline text — which is why reviewing minified output for pages with heavy inline formatting is worth a quick visual check.
HTML minification on its own typically yields a smaller percentage reduction than CSS or JavaScript minification, since a well-written HTML document usually has less redundant whitespace to begin with compared to heavily commented stylesheets or scripts. Even so, it's a standard part of a complete front-end optimization pass — minifying HTML, CSS, and JavaScript together, combined with image optimization and server-side compression, adds up to a meaningfully faster-loading page overall, even when each individual step contributes a modest amount on its own. Logrith's CSS Minifier and JS Minifier cover the other two pieces of that same optimization pass.
All processing happens directly in your browser — your HTML code is never sent to a server, logged, or stored anywhere. This makes the tool safe to use with unpublished templates or proprietary markup, since nothing leaves your own device.
When inspecting a page's source — whether your own or a third-party site — densely packed, unindented HTML makes it hard to tell where one element ends and a nested one begins. Running it through Beautify restores a clear, properly indented tree structure, making it much easier to trace exactly how elements are nested, spot a missing closing tag, or understand a layout's structure before modifying it.
HTML has a specific category of elements — called void elements — that never have a closing tag and never contain child content: tags like <br>, <img>, <input>, <hr>, and <meta>. When beautifying HTML, these elements need to be recognized and treated differently from regular container elements, since a normal tag increases the indentation level for everything nested inside it, while a void element should never do that, as there's nothing nested inside it to indent. This tool's beautifier maintains a list of standard void elements and handles them correctly, so the indentation stays accurate even in markup that mixes void and container elements throughout, avoiding the lopsided indentation that a naive beautifier would otherwise produce.