Free HTML Entities Encoder & Decoder — Encode Special Characters
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HTML uses angle brackets, ampersands, and quotes as part of its syntax. If your content contains these characters — a math equation with < and >, a company name with &, or quoted text — they must be encoded as HTML entities to display correctly and prevent rendering issues or security vulnerabilities.
Our free HTML entities encoder converts special characters to their HTML entity equivalents and back. Paste text and encode it for safe HTML insertion, or paste encoded text and decode it to readable form. Everything runs in your browser.
What Are HTML Entities?
HTML entities are text sequences that represent special characters. They start with & and end with ;. The less-than sign (<) is written as <. The ampersand (&) is &. The quote (") is ".
This system exists because HTML uses these characters for markup syntax. A literal < in your content would be interpreted as the start of an HTML tag. Encoding it as < tells the browser "display a less-than sign" instead of "start a new tag."
Why You Need to Encode HTML
Prevent broken rendering. An unencoded < in your content might be interpreted as a tag opening, breaking your page layout. Encoding prevents this.
Prevent XSS attacks. Cross-site scripting (XSS) is one of the most common web vulnerabilities. It works by injecting HTML/JavaScript through user input. Encoding user-supplied content before inserting it into HTML prevents malicious scripts from executing. This is not optional — it is a security requirement.
Display code snippets. If you are showing HTML code on a webpage (like a tutorial or documentation), the HTML must be encoded or the browser will try to render it instead of displaying it as text.
Common HTML Entities Reference
| Character | Entity Name | Entity Number | Description |
|---|---|---|---|
| < | < | < | Less than |
| > | > | > | Greater than |
| & | & | & | Ampersand |
| " | " | " | Double quote |
| ' | ' | ' | Single quote / apostrophe |
| |   | Non-breaking space | |
| © | © | © | Copyright symbol |
| — | — | — | Em dash |
| ™ | ™ | ™ | Trademark |
When to Use HTML Encoding
- User-generated content. Any text submitted by users — comments, profile bios, form submissions — must be encoded before rendering in HTML.
- Code tutorials and documentation. Showing HTML code on a webpage requires encoding the example code.
- Email templates. HTML emails need special characters encoded for consistent rendering across email clients.
- CMS content. Content management systems should encode user content before storing or displaying it.
- API responses. When an API returns HTML content, special characters should be entity-encoded.
Frequently Asked Questions
Is HTML encoding the same as URL encoding?
No. HTML encoding uses named or numeric entities (<, <) for display in HTML documents. URL encoding uses percent-encoding (%3C) for safe inclusion in URLs. They solve different problems in different contexts.
Do I need to encode every character?
No. Only characters that have special meaning in HTML need encoding: <, >, &, ", and '. Regular text characters do not need encoding. The tool handles this automatically — it only encodes characters that require it.
Can I use entity numbers instead of entity names?
Yes. < (name) and < (number) both produce the same result. Entity names are more readable. Entity numbers work for any Unicode character, even those without named entities.
Does this prevent XSS attacks?
HTML encoding is one essential part of XSS prevention. It prevents injected scripts from executing by converting < and > to their entity equivalents. However, comprehensive XSS prevention also requires proper input validation, Content Security Policy headers, and context-aware encoding.
Is my data private?
Yes. All processing happens in your browser. No data is sent to any server.
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