Q: Why do I need to encode HTML entities?

Encoding HTML entities prevents your content from being interpreted as HTML code. Without encoding, characters like could create unwanted HTML tags, and & could start an entity reference. This is especially critical for preventing XSS (cross-site scripting) vulnerabilities in web applications.

Q: Which characters must be encoded in HTML?

The five characters that must always be encoded in HTML content are: & (ampersand) → &, (greater than) → >, " (double quote) → " (inside attributes), and ' (single quote) → ' (inside attributes).

Question 1

What are HTML entities?

Accepted Answer

HTML entities are special codes used to represent characters that have special meaning in HTML (like <, >, &) or characters that are difficult to type. They start with an ampersand (&) and end with a semicolon (;). For example, < represents the less-than sign (<).

Question 2

Why do I need to encode HTML entities?

Accepted Answer

Encoding HTML entities prevents your content from being interpreted as HTML code. Without encoding, characters like < and > could create unwanted HTML tags, and & could start an entity reference. This is especially critical for preventing XSS (cross-site scripting) vulnerabilities in web applications.

Question 3

What is the difference between named and numeric entities?

Accepted Answer

Named entities use a descriptive name (like & for & or < for <). Numeric entities use either a decimal number (&#38; for &) or hexadecimal number (&#x26; for &). Named entities are easier to read, but numeric entities can represent any Unicode character.

Question 4

Which characters must be encoded in HTML?

Accepted Answer

The five characters that must always be encoded in HTML content are: & (ampersand) → &, < (less than) → <, > (greater than) → >, " (double quote) → " (inside attributes), and ' (single quote) → ' (inside attributes).

Question 5

Is my data stored or sent to a server?

Accepted Answer

No. All encoding and decoding happens entirely in your browser using JavaScript. Your data never leaves your device, is never transmitted, and is never logged.

Question 6

Does this tool handle Unicode characters?

Accepted Answer

Yes. The decoder handles numeric HTML entities in both decimal (&#8364; for the euro sign) and hexadecimal (&#x20AC;) formats, covering the full Unicode range. The encoder focuses on the most common special characters that require encoding in HTML.

Character	Entity	Description
&	&	Ampersand
<	<	Less than
>	>	Greater than
"	"	Double quote
'	'	Single quote / Apostrophe
(space)		Non-breaking space
©	©	Copyright
®	®	Registered
™	™	Trademark
—	—	Em dash
€	€	Euro sign
£	£	Pound sign

HTML Entity Encoder / Decoder

Common HTML Entities Reference

How It Works

Enter Your Text or HTML

Choose Encode or Decode

Copy the Result

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