HTML Encoder / Decoder

Encode special characters to HTML entities and decode them back

Input

Output

Common HTML Entities Reference

Character	Entity Name	Entity Number	Description
<	<	<	Less than
>	>	>	Greater than
&	&	&	Ampersand
"	"	"	Double quote
'	'	'	Single quote
			Non-breaking space
©	©	©	Copyright
®	®	®	Registered
™	™	™	Trademark

How HTML Encoding Works

HTML encoding converts special characters into entity references that browsers display as the original characters without interpreting them as HTML markup.

Why Encode HTML?

Security: Prevents XSS (Cross-Site Scripting) attacks by escaping user input.
Correctness: Ensures characters like < and > display properly instead of being parsed as tags.
Compatibility: Some characters need encoding to be valid in HTML documents.

Frequently Asked Questions

What are HTML entities?

HTML entities are special codes that represent characters with special meaning in HTML. For example, < is < and & is &.

Why do I need to encode HTML?

HTML encoding prevents XSS attacks and ensures special characters display correctly instead of being interpreted as HTML tags.

What entities does this tool handle?

This tool handles all standard HTML entities including < > & " '   © ® ™ and numeric references.

Go deeper

Read the SnoopTool guide behind this tool

The calculator gives you the number. These SnoopTool guides explain the method, the assumptions and the decision — with worked examples, data tables and FAQs.

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Answers, not just a number

Short, exact answers to the questions people ask alongside this tool — the number first, then the working.

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