HTML Beautifier
Beautify or minify HTML markup.
About HTML Beautifier
HTML Beautifier reformats HTML markup with consistent 2-space indentation, making nested structures readable at a glance. The minifier strips comments and collapses whitespace between tags to produce the smallest possible output. Both operations run entirely in your browser — nothing is uploaded anywhere.
FAQ
- Does this handle malformed HTML?
- The beautifier works best with valid HTML. Malformed tags may produce unexpected indentation.
- What does minification remove?
- HTML comments, excess whitespace between tags, and redundant newlines.
- Is this safe to use on production HTML?
- Always test minified output. Whitespace matters in some inline elements like <pre> and <code>.
ABOUT THIS TOOL
Paste HTML in either direction: feed it minified, single-line markup pulled from a page's source and get back properly nested, indented HTML that's easy to read, or paste clean HTML and collapse it into a compact single line for production. The beautifier preserves the actual structure and attributes - it doesn't change what the markup does, only how it's formatted. This is useful for inspecting what a website is actually sending to the browser, reviewing a template before editing it, or checking that auto-generated markup from a CMS or component library nests the way you expect.
HOW TO USE
- Paste your HTML into the input box.
- Choose beautify to expand and indent it, or minify to compact it.
- Check that tags are properly nested in the beautified output - improper nesting in the source will show up as unusual indentation.
- Copy the result for use in your editor, browser devtools, or file.
- Toggle back and forth if you need both a readable and a compact version.
COMMON USE CASES
- A developer viewing a page's source in the browser and pasting the minified HTML here to understand its structure.
- Someone auditing a third-party embed or widget snippet before dropping it into their own site.
- A front-end developer preparing a static HTML file for production by minifying it to shave off some transfer size.
- A student inspecting how a framework like React or a CMS renders nested elements in the final markup.
- Someone debugging a layout bug who needs clear indentation to spot an unclosed or misplaced tag.
TIPS & COMMON MISTAKES
- Beautifying doesn't fix invalid HTML - if a tag is unclosed or improperly nested, the indentation in the output reflects, rather than corrects, that problem.
- Minifying removes whitespace between tags, which is safe for layout in nearly all cases, but can occasionally affect inline-block elements that rely on whitespace for visible gaps.
- Embedded script and style blocks are typically left with their content intact rather than being minified as HTML - use a dedicated JS or CSS minifier for those.
- Void elements like img, br, and input don't need closing tags in HTML, so the beautifier won't add or expect them.
MORE QUESTIONS
- Will minifying my HTML break inline JavaScript event handlers?
- No, attributes like onclick keep their exact value, since minification only touches whitespace and formatting between and within tags, not attribute contents.
- Does beautifying fix unclosed tags or invalid nesting?
- No, it formats based on the structure it finds. If a tag is unclosed, the parser makes a best-effort guess at nesting, which can produce odd indentation that's actually a useful signal something is wrong in the source.
- How much size reduction does HTML minification typically give compared to CSS or JS minification?
- Usually less, since HTML has less repetitive whitespace than CSS or JS, and modern gzip or brotli compression on the server already removes most of the benefit of stripping whitespace manually.
- Can I beautify a full HTML document including the head and html tags?
- Yes, full documents work the same as fragments - the tool preserves the DOCTYPE declaration, head elements, and comments while reindenting the whole structure.