HTML Entity and Unicode Converter は何をしますか？
HTML Entity and Unicode Converter はブラウザ上でコンテンツをエンコードまたはデコードするツールで、結果と制限を明確に示します。 検証済みの機能： HTML entity encoding, Entity decoding, Unicode escapes, Code-point inspection.
Encoding is not sanitization
Use entities to display reserved characters as text in an HTML text or quoted-attribute context. Use a maintained HTML sanitizer when users are allowed to submit markup, because safe elements and attributes require policy decisions.
使い方
- Choose entity encode/decode, Unicode escape encode/decode, or List code points.
- Enter text or encoded values; the result updates immediately.
- Verify the output context before copying it into HTML, JavaScript, CSS, or another language.
実際の入出力例
Escape markup-significant characters
入力
<b title="A&B">Café</b>出力
<b title="A&B">Café</b>The encoder escapes ampersands, angle brackets, quotation marks, and apostrophes while leaving ordinary Unicode text intact.
一般的なエラーと対処
| 症状 | 原因 | 対処 |
|---|---|---|
| Encoded text is still unsafe in an event handler or script block. | HTML entity encoding alone does not cover JavaScript, CSS, URL, or attribute-policy risks. | Use context-aware escaping and a trusted sanitizer or templating system for untrusted HTML. |
| Unicode decode leaves an escape unchanged. | The input is not a four-digit \uXXXX escape or a \u{...} code-point escape. | Correct the escape syntax and ensure the value is a valid Unicode code point. |
Important behavior of HTML Entities
このツール固有の制限： Entity encoding prevents characters from being interpreted as markup; it is not a complete HTML sanitizer.
標準と実装の参考資料
- WHATWG HTML — Named character references (opens in a new tab)Defines named HTML character references and parsing behavior.
- Unicode Standard (opens in a new tab)Defines Unicode scalar values and code points used by the inspection modes.
HTML Entities — FAQ
Does the HTML Entities upload my input?
No. Processing runs in the current browser tab, and the page does not send tool input to a KitLumi processing endpoint.
What input does the HTML Entities accept?
It accepts plain text, HTML entities, or JavaScript-style Unicode escapes. The workspace checks the input and reports malformed or unsupported values before it produces a result.
What does the HTML Entities produce?
It produces entities, decoded text, Unicode escapes, or a code-point list. Copy and download controls appear when the output format supports them.
What limitation should I know?
Entity encoding prevents characters from being interpreted as markup; it is not a complete HTML sanitizer.
更新内容
実質的な更新： HTML Entities: Added HTML entity encoding, Entity decoding, Unicode escapes, Code-point inspection, responsive controls, explicit runtime disclosure, and task-specific examples and limitations.