HTML Entity Encode/Decode
Convert special characters to HTML entities and back. Encode text for safe HTML embedding or decode entity references instantly.
About HTML Entity Encode/Decode
The HTML Entity Encode/Decode tool converts special characters to their HTML entity equivalents and vice versa. This is an essential operation for web developers who need to safely embed text content within HTML documents without triggering unintended markup interpretation.
When encoding, the tool converts the five characters that have special meaning in HTML: ampersands (&), less-than signs (<), greater-than signs (>), double quotes ("), and single quotes ('). These are the characters that can break HTML structure or create security vulnerabilities if left unescaped.
The decoder handles all three types of HTML entity references. Named entities like & and are converted to their corresponding characters. Decimal numeric entities like © and hexadecimal entities like © are also fully supported, covering the entire Unicode character set.
A live HTML preview shows you exactly how the decoded text will render in a browser, which is particularly useful when working with entities that represent non-printable or special formatting characters. This preview helps you verify that your encoding or decoding produced the expected result.
This tool is invaluable for preventing cross-site scripting (XSS) attacks by ensuring user-generated content is properly escaped before being inserted into HTML. It is also useful for preparing code samples for blog posts, creating email templates with special characters, and debugging rendering issues caused by unescaped content. All processing is performed in your browser with no server communication.
Frequently Asked Questions
What are HTML entities?
HTML entities are special sequences that represent characters which have reserved meaning in HTML, such as angle brackets, ampersands, and quotation marks. For example, the less-than sign is represented as < and the ampersand as &. Using entities prevents browsers from misinterpreting these characters as HTML markup.
When should I encode HTML entities?
You should encode HTML entities whenever you display user-generated content on a web page, insert text into HTML attributes, or embed code examples in documentation. This prevents cross-site scripting (XSS) vulnerabilities and ensures special characters render correctly in the browser.
What is the difference between named and numeric HTML entities?
Named entities use human-readable references like &amp; for the ampersand, while numeric entities use the Unicode code point like &#38; or &#x26;. Both produce the same result. Named entities are easier to read in source code, while numeric entities can represent any Unicode character.
Does this tool handle all Unicode characters?
Yes. The tool encodes the five critical HTML characters (ampersand, less-than, greater-than, double quote, single quote) which are necessary for safe HTML embedding. The decoder handles named entities, decimal numeric entities, and hexadecimal numeric entities for the full Unicode range.