HTML Beautifier
Add proper indentation to messy or minified HTML — free, instant.
Turning Minified HTML Back Into Something Readable
A page's HTML source, once minified for production or copied from a browser's "view source," often arrives as one dense block with no indentation showing which tags nest inside which — technically valid markup, but nearly impossible to read or edit by eye. This tool re-indents that HTML, revealing the actual nesting structure.
How the Reformatting Works
The tool parses your HTML's tag structure to determine nesting depth — every time an opening tag appears, indentation increases for its children; every closing tag brings it back — then re-outputs the markup with consistent spacing reflecting that hierarchy, all through client-side JavaScript. This is purely a cosmetic transformation: no tags are added, removed, or altered, only the whitespace surrounding them.
A Worked Example
A minified snippet like <div class="card"><h3>Title</h3><p>Text</p></div> reformats into three indented lines, with the h3 and p tags visibly nested one level inside the div — instantly clarifying the structure in a way the single-line version obscures, especially once real-world markup involves five or six levels of nesting rather than this simple example.
Where People Need This
A developer inspecting a competitor's or reference site's page structure via "view source," where the HTML was served minified for production. Someone debugging a template output that came out as one unbroken line, needing to see exactly where a tag wasn't closing properly. A student learning HTML who benefits from seeing properly nested, readable markup rather than a dense single line. Anyone receiving an HTML email template or snippet from a colleague as one long line and needing to actually edit it.
Beautified HTML vs. Minified HTML
Beautified (indented) HTML exists for human reading and editing — during development, debugging, or learning. Minified HTML (no unnecessary whitespace) is for production delivery, since removing whitespace reduces the bytes a browser downloads. The right workflow is developing and maintaining readable HTML, then minifying only at deployment time — use this tool to go the other direction when you've received minified markup and need to actually work with it.
What Beautifying Won't Fix
This tool reformats whitespace and indentation only — it doesn't validate whether your HTML is well-formed, fix an unclosed tag, or catch invalid nesting. If the underlying markup has a genuine structural error (like a `<div>` that's never closed), the beautifier will still attempt to format it, but the output may look unexpectedly indented in a way that hints at, rather than explicitly flags, the underlying problem.
Processed Entirely On Your Device
Parsing and reformatting run with client-side JavaScript directly in your browser — a snippet you're inspecting, even if it comes from an internal or unreleased project, is never uploaded to a server during the process.
Beautifier vs. Browser DevTools' Formatted View
Browser DevTools already show a formatted view of a page's live DOM, but that's tied to inspecting a page you have open — it doesn't help when you've received a raw HTML string via email, a chat message, or a text file and need to read it outside a browser's inspector panel. This tool handles that standalone case directly.
A Second Example
Someone building a custom HTML email template receives a colleague's draft as one long unbroken line, copy-pasted from an email client that stripped the formatting. Running it through the beautifier reveals the actual table and cell structure the email relies on, making it possible to actually edit specific cells without guessing at where one nested table ends and another begins.
Does beautifying change how my HTML renders in a browser?
No — only whitespace between tags is affected; browsers ignore that whitespace when rendering, so the visual output stays identical before and after.
Can this tool also validate whether my HTML is correct?
It reformats structure based on tag nesting but doesn't perform full HTML validation — use a dedicated HTML validator if you need to check for genuine markup errors.
Will beautifying add unnecessary line breaks inside text content, like a paragraph?
The tool aims to preserve text content as written, adding structural indentation around tags rather than breaking up the actual text inside a paragraph or other content element.
Does this work on HTML fragments, or does it need a full document?
It works on partial HTML snippets just as well as a complete document with doctype and html tags, so pasting in just a div and its contents is fine.
Is there a size limit for the HTML I can beautify?
No fixed limit — very large HTML documents simply take proportionally longer to process since everything runs on your device.
Beautifying Before Debugging a Layout Issue
Trying to diagnose why a nested element isn't behaving as expected inside minified markup means fighting the formatting itself before even reaching the actual bug — indentation that visually shows parent-child relationships makes structural problems (like a tag closed in the wrong place) far easier to spot than scanning one dense line for the same mistake.