HTML Formatter / Beautifier

What is an HTML Formatter?

An HTML formatter, or beautifier, takes minified or inconsistently indented HTML and reformats it with clean indentation, sensible line breaks, and proper nesting so the document is easy to read and edit. HTML delivered to the browser is frequently minified for performance, which makes it almost impossible to scan or debug by hand.

Our HTML Formatter uses a proven beautification engine that understands HTML's quirks — void elements like img and br that never close, inline versus block elements, and embedded script and style blocks — to produce output that reflects the true structure of your document.

How to Beautify HTML

• Paste your HTML, or click Sample to load an example fragment
• Choose 2 spaces, 4 spaces, or tabs for indentation
• The formatted, nested markup appears instantly in the output pane
• Embedded CSS and JavaScript inside style and script tags are kept intact
• Click Copy to copy the clean HTML to your clipboard

Why Format Your HTML?

Well-indented HTML makes structure obvious: you can immediately see which elements are nested inside which, spot unclosed tags, and locate the section you need to edit. This dramatically speeds up debugging layout issues and modifying templates.

Developers format HTML when inspecting page source, cleaning up output from CMS platforms and page builders, preparing email templates, and reviewing markup generated by frameworks. Clean HTML is also easier to diff in version control, making code reviews faster and clearer.

Privacy

All beautification happens in your browser. Your HTML — which may contain unreleased markup, internal URLs, or proprietary templates — is never sent to a server, so the tool is safe for confidential work.

Key Features

• Proven beautification engine that understands HTML's quirks
• Handles void elements, inline vs block elements, and embedded script and style
• Indentation options — 2 spaces, 4 spaces, or tabs
• Preserves the contents of script and style blocks
• One-click copy of the clean, nested markup
• 100% browser-based — your HTML never leaves your device

Formatting Machine-Generated HTML

A huge amount of the HTML developers encounter is not written by hand but produced by something else — a content management system, a page builder, an email-template tool, a framework's server-side renderer, or a 'view source' on a live page. This generated markup is almost always minified or inconsistently indented, with deeply nested elements crammed onto a few enormous lines. Trying to understand or edit it in that state is painful and error-prone.

A formatter restores the structure that was stripped away, laying out one element per line and indenting by depth so the document's hierarchy becomes obvious at a glance. Suddenly you can see which div closes where, spot an unclosed tag, and locate the exact section you need to change. This is invaluable when debugging layout issues, cleaning up exported templates, reviewing markup in a code review, or simply learning how a page is built — and because clean HTML diffs cleanly in version control, it makes collaboration easier too.

Why Choose Our HTML Formatter?

This HTML formatter is completely free, needs no signup, and runs entirely in your browser. Your markup — which may include unreleased pages, internal URLs, or proprietary templates — is never uploaded to a server, so it is safe for confidential work. The beautification engine understands HTML's real-world quirks, so embedded CSS and JavaScript are preserved intact rather than mangled.

The HTML Formatter is one of more than 200 free tools on ToopTools. If you clean up markup regularly, you can pin it to your personalized My Workspace workspace so it stays beside your other web-development utilities, always one click away. It works on any modern browser, on desktop and mobile.

Is the HTML formatter free?

Yes. It is completely free with no limits and no signup. You can beautify as much HTML as you like, as often as you like, without ever creating an account.

Does it keep my inline CSS and JavaScript intact?

Yes. The contents of style and script blocks are preserved, so embedded CSS and JavaScript are not altered when the surrounding HTML is reformatted. Only the markup's indentation and line breaks change.

Can it format minified HTML?

Absolutely — that is one of its main uses. Paste minified or single-line HTML and the formatter expands it into clean, properly indented, nested markup that is easy to read and edit.

Does formatting change how the page looks?

No. Formatting only adds indentation and line breaks for readability; it does not change the content or structure of the document, so the page renders exactly the same in the browser.

Is my HTML kept private?

Completely. All beautification happens locally in your browser, so your HTML is never uploaded, logged, or stored on a server. It is safe to use with confidential markup.

Tips for Working with Formatted HTML

• Format machine-generated or minified HTML first, then read it top-down to understand the page structure
• Use consistent indentation across your team so HTML diffs stay small and readable in version control
• Watch for unclosed or mismatched tags — they become obvious once the document is properly indented
• Keep embedded scripts and styles tidy separately; the formatter preserves them but does not reformat their contents
• Re-format after pasting snippets from different sources to bring everything into a single consistent style

Does the formatter fix invalid HTML?

The formatter focuses on indentation and layout rather than correcting errors, but laying the markup out cleanly makes problems like unclosed tags and incorrect nesting much easier to see and fix yourself. It will not silently rewrite your document's structure.

Can I use it for email templates?

Yes. Email HTML is notoriously dense and table-heavy, and formatting it makes the structure far easier to navigate when you need to edit a template. The contents of style blocks are preserved, which matters for the inline and embedded CSS that email clients rely on.

How do I indent messy HTML code?

Paste your HTML and the tool instantly re-indents it with clean, consistent nesting and line breaks so the structure is easy to read. Pick your indentation style and copy the result. Your inline CSS and JavaScript are preserved intact.

Does the HTML formatter work offline?

Yes. Formatting runs entirely in your browser, so once the page has loaded the tool works without an internet connection and your HTML is never uploaded. It is safe to tidy up proprietary markup and templates on your own device.