HTML Entity Encoder – Encode and decode HTML entities
HTML Entity Encoder converts special characters to HTML entities and back. Enter text containing characters like <, >, &, " or accented letters to get a safe HTML format.
The tool is perfect for web developers who need encoded content for HTML attributes, JSON fields, or API responses. Prevents XSS vulnerabilities by encoding user inputs before display.
Why is HTML encoding important for security?
Unencoded user input can enable XSS attacks (Cross-Site Scripting), where attackers inject malicious JavaScript into pages. For example, `<script>alert('xss')</script>` encoded becomes `<script>alert('xss')</script>` — the browser displays it as text instead of executing it as code.
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Browse all tools →The HTML Entity Encoder converts special characters to HTML entities and back. An important tool for developers who want to ensure proper character display and security on websites.
Enter text and the tool converts special characters (like <, >, &, ö) into safe HTML entities.
- Encode special characters to HTML entities (e.g., & → &).
- Decode HTML entities back to readable characters.
- Copy the result directly into HTML code.
HTML entities ensure browsers display characters correctly without interpreting them as code.
- < and > characters can break HTML structure without encoding.
- Encoding is important for preventing XSS vulnerabilities.
- Different character standards (UTF-8 vs. ISO-8859) affect encoding needs.
Proper use of HTML entities improves website security and compatibility.
- Encoding user input is essential for security.
- Double encoding can cause incorrect display.
- The tool works entirely in the browser – no data is sent externally.