Why must special characters be escaped in HTML?

Characters like , and & are reserved syntax tokens in HTML. If user input contains raw brackets or quotes, browsers will parse them as HTML tags or attributes, which can break layout structure or cause Cross-Site Scripting (XSS) security vulnerabilities.

What is the difference between named entities and numeric entities?

Named entities use human-readable abbreviations (e.g. ©). Numeric decimal (©) and hexadecimal (©) entities refer directly to the character Unicode code point, ensuring compatibility with parsers that may lack full HTML5 named entity tables.

Is my data transmitted to any external server?

No. All character transformations and entity encoding/decoding execute locally in browser memory.

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