Does this validate my HTML?
No, it only reformats based on tag boundaries — it doesn't check that markup is well-formed.
Developer Tools
Beautify an HTML Snippet
Add readable line breaks and indentation to a dense HTML snippet, right in your browser.
How the indentation logic works
This formatter splits your HTML at each tag boundary and indents each line based on how deeply it's nested inside opening tags, closing tags correctly reducing the indent level back down. It specifically recognizes void elements — br, img, input, hr, meta, and similar self-closing tags — and correctly excludes them from increasing the indent level, since they have no matching closing tag.
It's a tokenizing pass built around tag boundaries, not a full HTML parser — it doesn't validate that your markup is well-formed, doesn't handle HTML comments specially, and can format unexpectedly if tags are already malformed or mismatched in the source.
Workflow at a glance
Use this quick flow to understand where the tool fits in your work and what to review before relying on the output.
Review checklist
Before
Confirm your HTML is reasonably well-formed — this formatter doesn't validate or fix mismatched tags.
After
Check the indentation, especially around void elements like br and img, before relying on the formatted output.
When a quick reformat is enough
Use it to quickly turn dense or minified HTML — copied from a browser's dev tools, an email template, or a build output — into something readable enough to scan and understand its structure.
Who beautifies HTML
Developers reading minified HTML
Reformat markup copied from a browser's dev tools or a minified build output.
Email template builders
Make an HTML email's markup readable before editing it.
Support and QA teams
Format copied HTML to discuss it more clearly in a bug report.
Students learning HTML structure
See tag nesting depth reflected clearly through indentation.
What the formatter does
Tag-depth indentation
Indents each line based on how deeply it's nested inside opening tags.
Void element awareness
Correctly excludes self-closing tags like br, img, and input from increasing indent level.
Closing tags reduce indent
A closing tag correctly steps the indentation back down before the next line.
Fast for typical markup
Works well on standard HTML snippets rather than deeply irregular or malformed markup.
Formatting HTML step by step
- 1Paste the HTML snippet you want to format.
- 2Review the output as it updates automatically with indentation reflecting tag nesting.
- 3Check that the structure looks correct, especially around any self-closing tags.
- 4Copy the formatted HTML into your editor, ticket, or documentation.
Where a readable snippet helps
Reformatting markup copied from a browser's dev tools or a minified build output.
Making an HTML email's markup readable before editing it.
Formatting copied HTML to discuss it more clearly in a bug report.
Seeing tag nesting depth reflected clearly through indentation while learning HTML.
Where your markup goes
Formatting happens entirely in your browser using tag-boundary parsing — nothing you paste is sent to a server.
Getting a reliable result
- Use this for typical, well-formed HTML rather than markup you suspect is broken or mismatched.
- Check the indentation around void elements (br, img, input) to confirm they didn't add an unexpected indent level.
- Compare the formatted result against the original for anything with unusual nesting before relying on it.
- Run production-bound templates through your project's own formatter for a fully validated result.
HTML formatting mistakes to avoid
Assuming this validates your HTML
It reformats based on tag boundaries — it doesn't check that your markup is well-formed or catch mismatched tags.
Not accounting for HTML comments
Comments aren't given special handling, so unusual comment placement could affect formatting.
Formatting already-broken markup
Malformed or mismatched tags in the source can produce unpredictable indentation here.
Using it as your only readability check
For production templates, a syntax-aware formatter in your project setup will catch more issues.
When to verify the output carefully
HTML Beautifier makes typical, well-formed markup easy to scan through tag-depth indentation. For validation or handling unusual edge cases like comments and malformed tags, pair it with your project's own tooling.
Need hands-on help?
Get help with documents, SEO, content, or website fixes
Use this tool for quick work. If you need a real file prepared, a page reviewed, or a website issue fixed, send the URL and describe the problem.
FAQ
HTML Beautifier FAQ
Answers for using HTML Beautifier on I Love Tool XYZ.
Does it handle self-closing tags like br and img correctly?
Yes, void elements are recognized and excluded from increasing the indent level.
Does it handle HTML comments specially?
No, comments aren't given special treatment in the formatting pass.
Is my markup sent to a server?
No. Formatting happens entirely in your browser.