HTML Formatter
Runs entirely in your browser
Beautify and indent HTML directly in your browser, based on tag nesting.
What is HTML Formatter?
HTML Formatter re-indents an HTML document so each nested element sits on its own line, making structure easy to scan. It's a text-based indenter, not a validator or parser — it won't fix broken markup, only make well-formed markup readable.
How to use HTML Formatter
- Paste your HTML into the Input box.
- Choose an indent size.
- Click Format, then copy the result.
Features
- Indents nested elements based on tag structure.
- Leaves <script>, <style>, <pre> and <textarea> contents untouched.
- Correctly handles void elements like <br> and <img>.
- 100% client-side — your markup never leaves your browser.
Frequently Asked Questions
Is my HTML uploaded to a server?
No. Formatting happens entirely in your browser.
Does this reformat script and style contents?
No. Content inside <script>, <style>, <pre> and <textarea> is left exactly as-is, since reformatting it could change behavior or displayed whitespace.
Does this fix invalid or unclosed HTML?
No. This is a text-based formatter, not a validator — it indents tags based on nesting but doesn't repair mismatched or unclosed tags.
Are attributes reformatted?
No. Attributes stay exactly as written on the same line as their tag — only tag nesting is indented.