HTML Entities Converter Online - Encode Decode Special Characters

Features

Real-time Conversion: Input content real-time conversion, no need to click button, instant view results
Encode Decode Switch: One-click switch encode and decode mode, meet different conversion needs
One-click Copy: Conversion result one-click copy to clipboard, quick paste to use
XSS Protection: Escape special characters, effectively prevent XSS cross-site scripting attacks
Local Processing: All conversion done locally in browser, not uploaded to server, protects privacy
Cross-platform Compatible: Supports PC, tablet, mobile and other devices, no software installation needed

How to Use

1

Select Conversion Mode

Select "HTML Encode" or "HTML Decode" mode at the top of tool page, choose corresponding mode according to conversion direction needed.

2

Enter Content

Enter text content to encode or decode in input box, supports HTML code, rich text and any content.

3

View and Copy Result

After entering, system will automatically real-time convert, result displays in result area, click "Copy" button to copy result to clipboard.

Use Cases

Web Development

Display special characters in HTML, ensure page correct rendering

XSS Protection

Escape user input content, prevent XSS cross-site scripting attacks

Content Editing

Handle HTML special characters in rich text editor

Email Template

HTML email template special characters correct display

Document Display

Display HTML code examples in technical documentation, tutorials

SEO Optimization

Ensure page special characters don't affect search engine crawling

HTML Entities Introduction

HTML entities are a way to represent special characters in HTML, starting with & and ending with ;.

What are HTML Entities?

HTML entities are a way to represent special characters in HTML. Because HTML uses <, >, & etc. characters as tag syntax, these characters cannot be directly used in content, need to be represented in entity form. HTML entities start with & symbol, end with semicolon ;, have named entities (like <) and numeric entities (like <) two forms.

Common HTML Entities Reference Table

& (ampersand) → &
< (less than) → <
> (greater than) → >
" (double quote) → "
' (single quote) → '
(non-breaking space) →

Why Use HTML Entities?

Using HTML entities mainly for three reasons: 1) Display reserved characters: <>& etc. characters in HTML have special meaning, need to use entities to represent; 2) Display invisible characters: like space, newline etc.; 3) Security protection: escape user input HTML characters, prevent XSS attacks.

Frequently Asked Questions

Q: Is HTML entities converter free?

A: Completely free, no registration login required, no usage limit, open webpage to use. All conversion done locally in browser, not uploaded to server, protects your data privacy.

Q: What's the difference between HTML entities and URL encoding?

A: HTML entities used in HTML documents, represent special characters, format is &xxx;; URL encoding used in URL, represent special characters, format is %XX. Both have different purposes, different encoding formats, cannot be mixed.

Q: Which characters need HTML escape?

A: In HTML content, main characters needing escape are: & (must escape, otherwise may break entity structure), < (must escape, otherwise will be treated as tag start), > (recommend escape), double and single quotes (need escape in attribute values).

Q: What's the difference between named entities and numeric entities?

A: Named entities use name to represent, like <, good readability but limited quantity; numeric entities use Unicode code point to represent, like <, can represent any character but poor readability. Common characters both support, special characters only can use numeric entities.

Q: What is XSS attack? Can HTML escape prevent XSS?

A: XSS (Cross-Site Scripting) is attacker injecting malicious scripts into webpage to get user info or cause damage. HTML entity escaping user input is basic method to prevent XSS, can convert script code to plain text display, making it unable to execute.

Q: What's the difference between   and regular space?

A:   is non-breaking space (Non-Breaking SPace), two texts connected using   won't be separated by line break; regular space in HTML multiple will be merged to one, and can line break at space.

Q: Will entered content be recorded?

A: No. All HTML entities conversion operations are done locally in your browser, content won't be uploaded to any server, not recorded, completely protects your data privacy and security.

HTML Entities Converter Online Tool