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HTML Entity Encoder

Encode special characters to HTML entities. Prevents XSS attacks and ensures HTML code displays correctly on web pages.

Your data never leaves your browser

How to Use

  1. 1

    Paste your text

    Enter the text containing special characters you want to encode — HTML tags, code snippets, or any text with <, >, &, or quotes.

  2. 2

    Click Encode

    The tool converts all special characters to their HTML entity equivalents.

  3. 3

    Copy the result

    Click Copy and paste the encoded text into your HTML source code.

What is HTML Entity Encoder?

An HTML entity encoder converts characters that have special meaning in HTML — like <, >, &, and quotes — into their safe entity equivalents (&lt;, &gt;, &amp;, &quot;). This prevents the browser from interpreting those characters as markup, which is essential for displaying code snippets, user-generated content, and any text that might contain HTML-like syntax.

The most important reason to encode HTML entities is security. Without encoding, user input containing <script> tags or JavaScript event handlers can execute in other users' browsers — an attack called Cross-Site Scripting (XSS). Encoding < as &lt; and > as &gt; neutralizes these attacks by turning executable markup into harmless display text.

This encoder handles the five critical characters that must always be escaped in HTML: ampersand (&amp;), less-than (&lt;), greater-than (&gt;), double quote (&quot;), and single quote (&#39;). It also works on entire code blocks, HTML templates, and any text you need to safely embed in a web page.

All processing runs in your browser — your text is never sent to a server. For the reverse operation, use our HTML Entity Decoder. For encoding characters in URLs instead of HTML, see the URL Encoder — the two encoding schemes serve different purposes.

FAQ

What characters are encoded?
The encoder converts the five most critical characters: & → &amp;, < → &lt;, > → &gt;, double quote → &quot;, and single quote → &#39;. These are the characters that can break HTML structure or create XSS vulnerabilities.
Why is HTML encoding important for security?
Without proper encoding, user input containing <script> tags or event handlers could execute as JavaScript in other users' browsers (XSS attacks). HTML encoding neutralizes these by converting < and > to their entity equivalents, making the browser display them as text.
Is this the same as URL encoding?
No. HTML encoding converts characters to HTML entities (&lt;, &amp;) for safe display in HTML documents. URL encoding converts characters to percent-encoded form (%20, %3D) for safe use in URLs. They serve different purposes.
What is the difference between HTML encoding and URL encoding?
HTML encoding converts characters to entity references (< becomes &lt;) for safe display in HTML documents. URL encoding converts characters to percent-encoded sequences (space becomes %20) for safe transmission in URLs. Use HTML encoding when embedding text in HTML, and URL encoding when embedding text in URLs.
Do modern frameworks like React handle HTML encoding automatically?
Yes. React, Vue, Angular, and Svelte all auto-encode text content by default when you use standard template syntax ({value} in JSX, {{ value }} in Vue/Angular). You only need manual encoding when bypassing framework protections with dangerouslySetInnerHTML (React) or v-html (Vue).

Related Articles

HTML Entities: Complete Reference Table with Examples

URL Encoding & Percent-Encoding: Complete Guide with Examples

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