HTML Formatter: Free Online HTML Beautifier

This HTML formatter turns minified or messy markup into readable code you can scan and edit. Paste your HTML, choose 2 spaces, 4 spaces or a tab for indentation, and click Format / Beautify. It is built for developers, content editors and anyone debugging a page, and it gives you copy-ready output.

What Is HTML Formatting?

HTML formatting is the process of rearranging the whitespace in HTML source so people can read it, without changing what the browser displays. HTML (HyperText Markup Language) is the standard language for describing the structure of a web page with tags such as headings, paragraphs, links and tables.

Browsers ignore most extra spaces and line breaks between tags, so the same page can be written as one unbroken line or as a neatly indented document. Build tools, email platforms, page builders and CMS exports often produce the one-line version because it is smaller. That is efficient for machines and painful for humans.

A formatter (also called a beautifier or pretty printer) reverses that. It restores line breaks and indentation so each tag and attribute is easy to find. Indentation size is a style choice, which is why the tool lets you pick it.

How to Use the HTML Formatter

You can format a block of HTML in under a minute by following the controls on the page in order.

1. Open the Indentation menu and choose 2 Spaces (the default), 4 Spaces or Tab.
2. Paste your markup into the Input HTML box. You can paste a full document or just a fragment such as one table or one navigation block.
3. Click Format / Beautify. The result appears in the Output area, and the page confirms with the message "HTML formatted."
4. Read through the Output and check that the structure looks the way you expect.
5. Click Copy to put the formatted code on your clipboard, then paste it into your editor or CMS.
6. Click Clear to empty the box and start with a new snippet.

If you click Format / Beautify with an empty box, you will see "Paste some HTML first." The tool accepts up to 500,000 characters per run, which is enough for most full pages.

Which Indentation Setting Should You Pick?

Choose the indentation that matches the project you will paste the code back into, because consistent style matters more than the specific number.

If you are not sure, keep the default of 2 spaces. It is the most common choice in front-end projects and keeps nested markup from drifting off the right edge of the screen.

Worked Example: Formatting a Messy Tag

Here is what the tool does to a single compressed element, so you can predict the result for your own code. Suppose you paste this one-line snippet with 2 Spaces selected:

<div class="card" id="plan-1" data-tier="pro">Pro plan</div>

After you click Format / Beautify, the opening tag is spread across several lines, with each attribute on its own line and indented by two spaces:

• <div
• class="card"
• id="plan-1"
• data-tier="pro">Pro plan</div>

The attribute values are unchanged, the text "Pro plan" is unchanged, and the browser renders the exact same box. What changed is that you can now see three attributes at a glance instead of hunting through a long line. Switch the menu to 4 Spaces and click again, and the attributes move four columns in instead of two.

How to Read the Output and Fix Common Problems

A good result is code where every tag and attribute is easy to locate and the content is exactly what you pasted. Check three things after each run.

Is your text still intact?

Text between tags, comments and the contents of script, style, pre and textarea elements are left exactly as written. That protects preformatted text, inline scripts and CSS from accidental changes. If you want those parts tidied too, copy them into the CSS Formatter or the JavaScript Formatter.

Does the output look odd or unchanged?

If a section looks the same as before, it is probably inside one of the protected elements or it is plain text, which the tool deliberately does not alter. Pasting a fragment that starts in the middle of a tag can also confuse the reading of the markup. Paste whole tags, from the opening angle bracket to the closing one.

Did you see an error?

• Paste some HTML first. The input box is empty or contains only spaces.
• Use at most 500,000 characters. Split a very large page into sections and format each one.
• Unable to read markup. The input contains a structure the tool cannot step through. Look for a broken tag, such as a missing closing angle bracket, and fix it before trying again.

Can You Also Minify HTML Here?

Yes. The Minify button does the reverse of formatting by collapsing the whitespace inside your tags so the markup takes up less space, and the page confirms with "HTML minified." Use it for a quick compact version of a snippet.

For heavier compression of whole pages or several files, the dedicated HTML Minifier is the better fit. A common routine is to keep a formatted copy for editing and publish a minified copy for visitors.

Who Uses an Online HTML Formatter?

An online formatter helps anyone who has to read HTML they did not write by hand, or who is away from their usual editor.

• Developers inspecting minified output from a build step or a view-source copy.
• Email and newsletter builders cleaning up exported HTML before editing a template in Outlook or another client.
• WordPress and CMS editors reading a block of generated markup to find a stray attribute.
• Students learning how tags nest by looking at readable code instead of one long line.
• Reviewers who need a snippet in a consistent style before pasting it into a ticket or pull request.

Many people search for how to format HTML in VS Code, Notepad++, IntelliJ or Sublime Text. Those editors have their own formatting commands (in VS Code, for example, Format Document, usually Shift+Alt+F on Windows). A web formatter is the quick option when you are on a shared computer, working from a phone, or just want to check one snippet without setting up an editor.

Best Practices and Common Mistakes

A few habits keep the output reliable and the code easy to maintain.

• Format a copy, not your only version. Keep your original until you have confirmed the formatted code works.
• Match your project style. Pick the same indentation your team uses so later diffs stay small.
• Paste complete tags. A snippet cut off mid-attribute is the most common reason for confusing output.
• Do not expect repairs. A formatter changes layout, not correctness. An unclosed div before formatting is still an unclosed div after it.
• Encode special characters separately. If you need to show tags as visible text on a page, run them through the HTML Encoder instead.
• Strip tags when you only need text. The Strip HTML Tags tool is faster than formatting and reading.

Limitations to Keep in Mind

The tool changes only whitespace inside markup and is intentionally conservative. It does not validate your HTML, fix invalid nesting, add missing closing tags or check accessibility and SEO issues.

It also leaves text content and protected elements alone, so a paragraph of text keeps whatever line breaks it already had. If you need to write and preview code rather than just tidy it, the HTML Editor Online gives you a live preview. For other formats, browse the Web Developer Tools collection.

Paste your markup into the box above, choose your indentation and click Format / Beautify. In a few seconds you will have readable code you can copy straight into your project.