What characters does HTML encoding convert?

The five critical characters are: & → &, → >, " → ", and ' → '. These are the characters browsers parse as HTML syntax.

What is the difference between HTML encoding and URL encoding?

HTML encoding converts characters to HTML entity references and is used within HTML content. URL encoding converts characters to %XX hexadecimal sequences for use within URLs. They are different mechanisms for different contexts.

Why should I encode user input before displaying it?

If you display user input without encoding, malicious users could submit JavaScript code that executes in visitors' browsers — a Cross-Site Scripting (XSS) attack. Always encode untrusted content before rendering in HTML.

Does HTML encoding affect the visual appearance of text?

No. Browsers automatically decode HTML entities when rendering, so visitors see the original characters. The encoding only affects the raw HTML source code.

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🏷️ HTML Encoder / Decoder

Convert special characters to HTML entities and back.

خروجی

What is an HTML Encoder / Decoder?

An HTML encoder converts special characters that have meaning in HTML syntax into their safe entity equivalents. For example, the less-than sign < becomes <, the ampersand & becomes &, and double quotes become ". This prevents browsers from interpreting content as HTML tags — a critical step for preventing Cross-Site Scripting (XSS) vulnerabilities in web applications.

HTML decoding does the reverse: it converts entity references back into their original characters. This is useful when you receive HTML-encoded data from an API, database, or CMS and need to display or process the raw text. Web developers, content managers, and cybersecurity professionals use HTML encoding daily to safely handle user-generated content and prevent injection attacks.

How to Use the HTML Encoder / Decoder

Paste your text or HTML into the input box.
کلیک کنید Encode HTML to convert special characters (< > & " ') to entities.
کلیک کنید Decode HTML to convert entity references back to their original characters.
استفاده کنید تعویض کنید to move the output to the input, then click کپی کنید برای کپی کردن نتیجه

Why Use Our HTML Encoder / Decoder?

100% رایگان — No cost, no usage caps.
بدون ثبت نام - دسترسی فوری بدون حساب.
مبتنی بر مرورگر — Text never leaves your browser; processed using native DOM APIs.
XSS Prevention — Correctly encodes the five critical HTML characters that enable script injection.
Bidirectional — Both encode and decode in one tool with swap functionality.

سوالات متداول

The five critical characters are: & (ampersand) → &, < (less-than) → <, > (greater-than) → >, " (double quote) → ", and ' (single quote) → '. These are the characters browsers parse as HTML syntax, so encoding them prevents XSS attacks.

HTML encoding converts characters to HTML entity references (<, &) and is used within HTML content and attributes. URL encoding (percent-encoding) converts characters to %XX hexadecimal sequences and is used within URLs. They are different escape mechanisms for different contexts.

If you display user input without encoding it, a malicious user could submit JavaScript code as their input (e.g. <script>alert('XSS')</script>), which would execute in every visitor's browser. This is called a Cross-Site Scripting (XSS) attack. Always encode untrusted content before rendering it in HTML.

No. Browsers automatically decode HTML entities when rendering a page, so visitors see the original characters. The encoding only affects the raw HTML source code. & in source renders as & in the browser, < renders as <, and so on.

حقایق سریع

✓ 100٪ رایگان، بدون هزینه پنهان
✓ بدون حساب کاربری یا ورود به سیستم مورد نیاز است
✓ در هر مرورگری کار می کند
✓ داده های شما هرگز دستگاه شما را ترک نمی کند
✓ Prevents XSS — encodes all 5 critical HTML characters