Output appears here...How to use
01
Paste the tangled markup
Single-line pages, scraped source, and generated templates are all fair game. The Try sample button loads a compressed snippet if you want a quick demo.
02
Hit Beautify
js-beautify indents every element two spaces per level and wraps long lines at 120 characters, so the nesting becomes visible at a glance.
03
Copy the readable tree
Take the formatted markup back to your editor with the Copy button, ready for review, diffing, or documentation.
Why HTML Beautifier
- Paste minified or messy markup and this html beautifier reformats it into a clean, indented tree in one click.
- A two-space indent with a 120-character wrap by default, so the html formatter output is easy to read and the html formatter online result stays tidy.
- Runs in your browser. Your code never leaves your device.
- Read the structure at a glance. It doubles as an html viewer for tangled markup, making nested tags legible.
- Free with no limit. This html beautifier online has no sign up and no cap.
Common questions
How do I clean up HTML that a CMS generated?
Paste the export and click Beautify. Page builders love inline everything and zero line breaks, and the html beautifier online pass separates the layers so you can find the element you need to change. It's the fastest way to make sense of markup you didn't write.
Can formatted output serve as an html viewer?
For reading structure, yes. Once indented, the markup works like an html viewer online view of the document tree, which is what most people mean when they search online html viewer or html code reader. You see hierarchy and nesting clearly, just as code rather than pixels.
Does this page render an html preview?
No, it formats source without executing it, so it's not an html preview and not an html css js online compiler that runs your page. Some people land here searching html online viewer and expecting pixels; what they get is readable source, which is usually what debugging actually needs. For a live render, open the file in a browser.
Will it flag mistakes like an html validator?
No. It happily indents broken markup without complaint, so an unclosed div stays unclosed, just easier to spot. Formatting first actually helps manual review, because mismatched nesting jumps out once indentation reflects structure. For strict conformance checking you'd still want a dedicated html validator.
Is it an html website inspector for live sites?
No, it doesn't fetch anything. Copy the source you want, using view-source in your browser or your scraper's output, and paste it in. That keeps the tool private too, since no URL of yours is ever requested from a server.
What settings does the html formatter online use?
Two-space indentation and a 120-character wrap, applied by js-beautify. There are no knobs to fiddle with, which is deliberate: paste, format, copy, move on. If your project uses tabs or a different width, reformat in your editor after pasting back.
Why beautify HTML before diffing two versions of a page?
Because a diff of two single-line documents highlights everything and tells you nothing. Format both versions here first and the diff collapses to the elements that really changed. The stable two-space output makes the comparison repeatable.
Will it format HTML code that arrived with no line breaks?
Yes. Paste the one-liner and Beautify reflows the markup, adding line breaks and a two-space indent so every tag lands at the right depth. Scraped pages and generated templates are the usual candidates.
Can it clean up HTML indentation that has become inconsistent?
It can. The tool re-derives indentation from the tag structure, so mixed tabs and random leading spaces are replaced with a steady two-space indent. That makes it the quick way to clean up html indentation before a diff or a review.