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HTML Encoder

Encode special characters into HTML entities instantly in your browser.

The HTML Encoder converts special characters in your text into their corresponding HTML entity codes, making your content safe to embed directly inside web pages without breaking the surrounding markup. Characters such as ampersands, angle brackets, double quotes, and single quotes all carry special meaning in HTML. If you paste raw text containing these characters into an HTML document, the browser may interpret them as tags or attribute delimiters rather than displaying them as visible text.

This tool solves that problem by replacing each special character with its named or numeric HTML entity: ampersand becomes &, less-than becomes <, greater-than becomes >, double quotes become ", and single quotes become '. The conversion is deterministic and reversible, so you can always decode the entities back to plain text with the companion HTML Decoder tool.

HTML encoding is essential for web developers who display user-generated content, build email templates, or write technical documentation that includes code samples. It is also a critical step in preventing cross-site scripting (XSS) vulnerabilities, because properly encoded output cannot be executed as HTML or JavaScript by the browser. Content management systems and templating engines typically encode output automatically, but there are many situations where you need to encode text manually before copying it into a template or database field.

Everything runs client-side in your browser using plain JavaScript, so your text is never transmitted to any server. Paste your content, view the encoded result instantly, and copy it wherever you need it.

Encoder

Results

How to Use

  1. Paste or type your text into the input field.
  2. The tool instantly encodes all special characters into HTML entities.
  3. Copy the encoded output for use in your HTML, emails, or documentation.
  4. Use the HTML Decoder tool to reverse the process when needed.

FAQ

Which characters does the HTML Encoder convert?

It converts the five characters that have special meaning in HTML: ampersand (&), less-than (<), greater-than (>), double quote ("), and single quote (').

Does HTML encoding prevent XSS attacks?

Encoding special characters is a critical first step in XSS prevention. By converting characters to entities, browsers render them as text rather than executing them as code.

Is my text sent to a server?

No. All encoding happens locally in your browser using JavaScript. Your data never leaves your device.

Can I encode an entire HTML document?

Yes. Paste any text, including full HTML markup, and every special character will be converted to its entity. This is useful for displaying code snippets on a web page.

What is the difference between HTML encoding and URL encoding?

HTML encoding converts characters to HTML entities for safe display in web pages. URL encoding converts characters to percent-encoded format for safe inclusion in URLs. They serve different purposes.

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Learn More

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Text Encoding & Security: Base64, URL Encoding, and Hashing Explained

Understand and use text encoding, URL encoding, and hash generation with free online tools.

9 min read

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Developers and content creators frequently need to encode, decode, or transform text for different contexts. Whether you are preparing data for a URL, encoding HTML entities, converting between binary and text, or simply counting characters, this collection has every text manipulation tool you need in one place.