HTML Entity Encoder / Decoder
HTML Entity Encoder / Decoder
Convert characters to HTML entities or decode them back to plain text
Rendering the Web: What are HTML Entities?
In HTML, certain characters are reserved for the language's syntax. For example, the less-than symbol (<) marks the beginning of an HTML tag. If you want to display this character as literal text on a webpage, you cannot simply type it; if you do, the browser will interpret it as the start of a tag, leading to broken layouts or hidden text. To solve this, HTML uses Entities. An entity is a special string of characters that represents a reserved or non-visible character. All HTML entities begin with an ampersand (&) and end with a semicolon (;).
Why Do We Need Encoding?
HTML Entity Encoding serves two primary purposes:
- Correct Rendering: It ensures that reserved characters (like
<,>, and&) and special symbols (like©,™, or emojis) are displayed correctly by the browser regardless of the document's character encoding. - Security (XSS Prevention): This is the most critical developer use case. By encoding user-provided data before injecting it into an HTML document, you prevent Cross-Site Scripting (XSS) attacks. Encoding converts a malicious script tag like
<script>into<script>, rendering it harmless text that the browser will display but never execute.
Named Entities vs. Numeric Entities
There are two ways to represent a character as an entity:
- Named Entities: These use easy-to-remember names. For example,
©represents the copyright symbol (©). - Numeric Entities: These use the character's Unicode point. For example,
©(decimal) or©(hexadecimal) also represent the copyright symbol.
When to Use This Tool
Our HTML Entity Encoder / Decoder is a dual-purpose tool for developers and content creators. Use the **Encoder** when you need to safely paste code snippets into a blog post, or when you're preparing data to be stored in a database that will eventually be rendered on a webpage. Use the **Decoder** when you've scraped data from a website and it's full of "ugly" strings like & or " and you need to convert it back into readable text for analysis or reporting.
Practical Examples
Consider the following line of code: <div class="container">Content & More</div>. If you wanted to show this *as code* on a website, the encoded version would be: <div class="container">Content & More</div>. By using our tool, you can instantly perform these conversions without having to look up individual entity codes in a reference table.