HTML Beautifier
Beautify minified or messy HTML with consistent indentation — instantly inside your browser.
What does this tool beautify?
HTML that's been minified, machine-generated, or just typed in a hurry can be hard to read — this tool re-indents HTML based on its tag nesting structure, so tags line up consistently and the markup becomes easy to scan.
GuideHow to use it
How the beautifying works
Each language uses its own nesting rules: HTML tracks opening and closing tags, CSS and JavaScript track curly braces. As the code is walked, each new nested block is indented one level deeper, and closing brackets or tags pull the indentation back out.
Why it helpsFeatures & benefits
Why this runs entirely in your browser
Beautifying runs in JavaScript locally in the tab, which means it keeps working offline once the page has loaded and nothing pasted here is ever sent to a server.
Common uses
Making a minified file readable for debugging, or cleaning up code before a code review.
Frequently asked questions
A few things people usually want to know before trusting the numbers.
No. Only whitespace and line breaks are adjusted — the actual markup and structure is preserved exactly.
No — it uses tag-based indentation rules rather than a full HTML parser, so it works well for typical markup but may not perfectly handle every edge case.
This tool only beautifies (adds formatting). Use the dedicated HTML Minifier to go the other direction.
Yes. Clicking a different language switches the page while keeping the code you've already entered for each language separately.
No. All beautifying happens locally in your browser. Nothing pasted here is sent to a server, stored, or shared.