HTML Formatter

Tidy HTML markup with consistent indentation and line breaks.

Category: Dev Tools

When to use?

Use it to tidy minified or badly indented HTML for readability, or to clean an HTML fragment before inserting into code.

How to use

  • Paste the HTML code.
  • Press format to fix indentation and line breaks.
  • Copy the tidied HTML.

Input Explanation

Paste HTML code that lacks indentation or is misaligned into the text area.

Calculation Basis

It parses the HTML, increasing the indent level on opening tags and decreasing on closing tags, to analyze the hierarchical tree and beautify with tabs or spaces.

Usage Examples

  • Tidy markup - Tidy minified or stuck-together HTML fragments for readability.
  • Quick pre-deploy check - Check inputs and output to reduce errors before dev/ops work.
  • Aid docs/reviews - Copy the tidied result into dev docs, issues, or review comments.

Examples

  • One-line <div><span>Hi</span></div> → line-broken and indented HTML by structure
  • A one-line HTML copied from a CMS → expanded by tag hierarchy

Cautions

  • Generated output is for reference; test carefully before production use.
  • HTML processing happens only in the browser and is not sent to a server.

Guides

HTML indentation and alignment

It indents HTML to make the nested structure readable. Especially useful for deeply nested or one-line minified code.

Minify feature

It also supports minifying by removing whitespace and line breaks to reduce size. You can set whether to remove comments when minifying.

FAQ

Is HTML processed on a server?

No. Input and formatting happen in the browser.

Is the pasted HTML sent out?

No. HTML tidying runs only in the browser and is not sent to a server.

Are inline scripts and styles tidied?

CSS/JS inside style and script tags is tidied by standard rules along with the HTML structure.

Is minified HTML tidied?

Yes, one-line minified HTML is expanded with indentation by tag hierarchy.

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