開発者ツールWeb Standards

HTML ソースコードをオンラインで整形

Beautify minified or messy HTML templates and components with standard nested indentation and tag alignment.

Processed locally in browser memory.
INPUT (HTML)
OUTPUT
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HTMLコード整形 の使い方

1

Paste HTML

Enter your raw or minified HTML code.

2

Format

Select 2-space or 4-space indentation.

3

Copy

Copy the clean, beautified HTML.

HTMLコード整形 について

Parses HTML tokens sequentially, tracking DOM nesting depth and inserting calculated indentation newlines around block-level elements.

対応フォーマット

HTMLHTM

利用制限

  • Preserves pre and textarea block content verbatim

主な機能

  • Configurable indent size (2 or 4 spaces)
  • Void element self-closing support
  • Preserves inline script and style blocks
  • One-click copy and download

よくある質問

Yes, content inside <style> and <script> tags is detected and formatted cleanly.
HTML整形ツール – HTMLコードをオンラインで美化・インデント整理 | Toolxilla