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Escape Unescapeツール

HTML、JavaScript、JSON用の特殊文字をエスケープ。無料で登録不要。

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How to Use

  1. Select the escaping format: HTML, JavaScript, or JSON
  2. Choose Escape or Unescape mode
  3. Paste your text into the input area
  4. Copy the escaped or unescaped result

Common Use Cases

  • Sanitizing user input before rendering in HTML
  • Preparing strings for JSON API payloads
  • Debugging escaped characters in log files
  • Building safe JavaScript string literals

Frequently Asked Questions

What is the difference between HTML and JavaScript escaping?
HTML escaping converts < > & " to HTML entities for safe display in web pages. JavaScript escaping adds backslashes before quotes, newlines, and special characters for safe use in JS strings.
Why do I need to escape strings?
Unescaped strings can cause XSS (cross-site scripting) attacks in HTML, syntax errors in JavaScript, or invalid JSON. Escaping ensures special characters are treated as data, not code.
Can I unescape encoded strings back to plain text?
Yes. Switch to Unescape mode and paste the encoded string. The tool will convert escape sequences back to their original characters.