What are HTML Entities and Why Must You Encode Them?
HTML entities are standardized character strings used to display reserved characters, invisible spaces, and symbols that would otherwise be interpreted as HTML markup by web browsers. When rendering dynamic content or user-submitted text on a web page, characters such as < (less than), > (greater than), & (ampersand), and " (double quote) must be converted into their respective entity representations (<, >, &, ").
Failing to encode these characters can break page layouts or introduce dangerous Cross-Site Scripting (XSS) vulnerabilities where malicious script injections run in users' browsers. This tool provides instant, bi-directional encoding and decoding between raw characters and named, decimal, or hexadecimal HTML entities.
How to Use This HTML Entity Encoder (3-Step Quick Guide)
Enter Raw Text or HTML
Paste raw text containing special characters, symbols, or existing HTML entities into the input field.
Choose Encode or Decode Mode
Select Encode to convert special characters into safe entities, or Decode to translate entities back to raw text.
Copy Clean Output
Click to copy the processed output directly into your HTML, JSX template, or markdown documentation.
Essential HTML Entities Reference
Frequently needed named, decimal, and hex entity codes for web development.
| Character | Named Entity | Decimal Code | Hex Code | Common Use Case |
|---|---|---|---|---|
| & | & | & | & | Ampersands in URLs and text |
| < | < | < | < | Prevent tag opening in code samples |
| > | > | > | > | Prevent tag closing in code samples |
| " | " | " | " | Quotes inside HTML attribute values |
| ' | ' | ' | ' | Single quotes inside scripts and attributes |
| |   |   | Non-breaking space preventing line wraps | |
| © | © | © | © | Copyright notices |
Frequently Asked Questions
Why must special characters be encoded in HTML?
Characters like `<`, `>`, and `&` have syntactic meaning in HTML. Encoding them ensures browsers treat them as text content rather than tags, eliminating markup errors and XSS vulnerabilities.
What is the difference between named and numeric entities?
Named entities (like `&`) use recognizable words, while numeric entities (like `&` or `&`) reference Unicode code points in decimal or hexadecimal form.
Does modern UTF-8 eliminate the need for HTML entities?
UTF-8 allows you to type international letters directly, but reserved HTML markup characters (`<`, `>`, `&`, `"`) still must be encoded to preserve markup integrity.
How can I decode entities in JavaScript?
You can decode entities in the browser using the DOMParser API: `new DOMParser().parseFromString(html, 'text/html').body.textContent`.