Can the formatter detect unclosed tags?

The formatter does not validate — it restructures based on the tags present. Use the HTML Validator to explicitly detect unclosed or mismatched tags.

Does formatting change the output of my HTML?

No. Formatting only adjusts indentation and whitespace — it does not alter tag structure, content, or attribute values. The rendered output in a browser will be identical before and after formatting.

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Format HTML Tags Online

Poorly formatted HTML tags — misaligned opening and closing pairs, inconsistent nesting, broken indentation — make code difficult to navigate. FixTools formats every HTML tag correctly, restoring the clean hierarchical structure your code deserves.

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Correctly indents all HTML tags

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Makes opening and closing tag pairs obvious

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Handles void elements and self-closing tags

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How to use this tool

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Paste your HTML and format. Every tag is indented based on its nesting depth, making the document hierarchy immediately readable.

How It Works

Step-by-step guide to format html tags online:

1
Paste HTML with formatting issues
Paste your HTML into the input panel.
2
Format
Click Format to apply correct indentation to every tag.
3
Inspect the tag hierarchy
Scan the indented output to verify tag nesting and identify any structural problems.
4
Fix and reformat
Make any necessary corrections and run the formatter again to confirm the fix.

Real-world examples

Common situations where this approach makes a real difference:

Finding mismatched HTML tags

A page has a subtle layout bug caused by a mismatched div tag. Formatting the HTML makes the div hierarchy immediately scannable, revealing the extra or missing closing tag.

When to use this guide

Use this when you are trying to identify which tags are incorrectly nested or closed by visually inspecting the indented structure.

Pro tips

Get better results with these expert suggestions:

Visual indentation reveals unclosed tags

After formatting, if the closing tags do not align with their openers, you likely have a missing or misplaced closing tag. The indented view makes this obvious.

Check void elements

HTML void elements (img, br, hr, input, meta, link) do not need closing tags. After formatting, verify none of your void elements have been given incorrect closing tags.

Use formatting to understand inherited code

When working with HTML you did not write, format it first. The visual tag hierarchy reveals the intended structure far faster than reading flat code.