What are HTML entities and why are they needed?

HTML entities are special character strings starting with & and ending with ;. They are used to represent reserved HTML characters (like ) to prevent browsers from misinterpreting them as code tags, and to display characters not found on standard keyboards.

What is the difference between named, decimal, and hexadecimal entities?

Named entities use mnemonic names (e.g., <). Decimal entities use the base-10 unicode number (e.g., <). Hexadecimal entities use the base-16 unicode value (e.g., <). All three render identically in the browser.

Which characters must always be escaped in HTML?

The five characters that must always be escaped to prevent syntax errors and XSS are: (>), & (&), " ("), and ' (' or ').

What is the entity code for a non-breaking space?

The non-breaking space entity is (decimal ). It creates a space character that prevents the browser from breaking or wrapping the line at that position, keeping words grouped together.

If my website uses UTF-8 encoding, do I still need HTML entities?

Yes. While UTF-8 allows you to type characters like copyright (©) or accents directly in your code, you must still escape reserved syntax characters like , and & to prevent HTML parsing conflicts.

How do I encode HTML entities in JavaScript?

JavaScript doesn't have a built-in encode function, but you can create one by replacing reserved characters using a map or by creating a temporary DOM element, setting its textContent, and reading its innerHTML.

How do I decode HTML entities in JavaScript?

To decode entities, you can create a temporary DOM textarea or div element, assign the encoded string to its innerHTML, and retrieve the decoded value using textContent or value.

Do HTML entities have an impact on SEO?

No. Search engine crawlers understand HTML entities and decode them during indexing. Using entities has no negative impact on search engine rankings and ensures page parsing remains valid.

Why do some browsers render HTML entities as question marks?

If a browser displays a question mark or a square box instead of the entity symbol, it means the font being used by the browser does not contain the glyph for that specific Unicode character code.

Can I use named HTML entities in XML files?

XML only predefines five named entities: <, >, &, ", and '. To use other named entities (like ©), you must declare them in the Document Type Definition (DTD), or use their decimal/hexadecimal unicode values instead.

utility calculator

HTML Entities Encoder & Reference Table

Encode and decode HTML entities and browse a complete reference chart of special characters and ASCII codes.

Formula Verified by Dr. Arthur Pendelton, PhD

Inputs

Input Text

Output Result

Entity Reference Table

Click any entity cell value to copy it

Symbol	Name Entity	Decimal	Hexadecimal	Description
				Non-breaking space
&				Ampersand
<				Less-than sign
>				Greater-than sign
"				Double quotation mark
'				Single quotation mark
¢				Cent sign
£				Pound sign
¥				Yen sign
€				Euro sign
©				Copyright sign
®				Registered trademark sign
™				Trademark sign
×				Multiplication sign
÷				Division sign
±				Plus-minus sign
§				Section sign
¶				Paragraph sign
•				Bullet symbol
…				Horizontal ellipsis

Results

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utility calculator

HTML Entities Encoder & Reference Table

Encode and decode HTML entities and browse a complete reference chart of special characters and ASCII codes.

Formula Verified by Dr. Arthur Pendelton, PhD

Inputs

Input Text

Output Result

Entity Reference Table

Click any entity cell value to copy it

Symbol	Name Entity	Decimal	Hexadecimal	Description
				Non-breaking space
&				Ampersand
<				Less-than sign
>				Greater-than sign
"				Double quotation mark
'				Single quotation mark
¢				Cent sign
£				Pound sign
¥				Yen sign
€				Euro sign
©				Copyright sign
®				Registered trademark sign
™				Trademark sign
×				Multiplication sign
÷				Division sign
±				Plus-minus sign
§				Section sign
¶				Paragraph sign
•				Bullet symbol
…				Horizontal ellipsis

Results

Related guides

Learn more about this calculation

Guide

Understanding Calculator Formulas: How DTC Turns Inputs into Results

Understand how Do The Calculation formulas are presented, what the explanation blocks mean, and how to verify calculator logic before using a result in a real decision.

Site Guide

How to Use Do The Calculation Calculators: A Practical Step-by-Step Guide

Learn the fastest reliable workflow for using Do The Calculation calculators, reading results, checking formulas, and using save, print, share, and export actions correctly.