HTML Formatter

An HTML Formatter re-indents messy markup so the nesting of a page reads at a glance. This one runs js-beautify in your browser, the same formatting library behind many editor tools, and it costs nothing with no upload. Pick a 2 space, 4 space or tab indent and paste your code.

How the HTML Formatter works

js-beautify reads your markup as a stream of tags and text, works out how deep each element sits, and rewrites the spacing at the start of each line. Headings, sections and list items land at their true depth, and the contents of script and style blocks get formatted along with the markup around them.

1. Paste HTML into the input box, or drop an .html file onto the page.
2. Choose your indent: 2 spaces, 4 spaces or a tab.
3. Watch the output update with clean, even indentation.
4. Scan the result for the section you need. Deep nesting now shows as visible steps.
5. Copy the formatted code, or download it as an .html file.

Void elements such as img, br and input never pick up closing tags they should not have, and text inside pre and textarea blocks is left exactly as written, because spacing inside those elements is content, not layout.

When messy HTML needs a formatter

View-source code is the everyday case. Markup copied out of a CMS, a page builder or a live site often arrives as a few enormous lines with every depth crushed together. Editing that directly is slow and risky. Ten seconds of formatting turns it into an outline where sections begin and end in plain view.

Email templates and inherited pages run a close second. Table-based email HTML nests deeper than almost anything else on the web, and a template handed down from a past project rarely arrives tidy. The CSS Beautifier and the JS Beautifier do the same job for the style and script blocks you pull out of such a page.

Review work benefits most of all. Formatted markup turns a wall of code into an outline you can actually review, which is how a stray unclosed section or a block pasted in the wrong parent gets caught by eye. When the page is finished and ready to ship, the HTML Minifier takes the padding back out.

What this HTML Formatter does and does not do

A formatter is not a validator. This tool re-indents the structure it can read. It does not check your markup for errors, and a missing closing tag or a misspelled attribute will not be flagged or fixed. If the output looks strangely nested somewhere, that spot usually deserves a look, because the formatter followed the structure it was given.

The engine works from the source text itself, token by token, rather than loading your page into a browser document and printing it back. That choice matters. A browser round trip can relocate stray content, drop odd attributes and quietly repair things you never asked it to touch. Working from the text means your tags, attributes and text stay as you wrote them. Only the whitespace moves.

One honest caveat covers rendering. Whitespace between block elements costs nothing, but whitespace between inline elements can show as a space on the rendered page. Pretty printing puts line breaks between inline items, so glance at inline-heavy rows after formatting, things like nav links and button groups, and check the spacing still reads right.

Your markup stays in your browser

js-beautify runs inside your browser tab. Your HTML is never sent to a ToolPeko server, never stored and never read by anyone here. That holds for a full page from a client project just as much as for a test snippet. There is no account, no sign-up and no formatting counter. Paste a fragment or a whole page and the terms stay the same.