HTML Entity Converter

In HTML and XML web markup, certain characters have reserved syntactic meanings that instruct browser rendering engines how to parse documents. For example, the less-than symbol (<) denotes the opening of an HTML tag, the greater-than symbol (>) closes an HTML tag, the ampersand (&) initiates an entity reference, and quotation marks delimit attribute values. If a web application displays user-submitted text containing these characters without escaping them into HTML entities, the browser may misinterpret the text as executable markup or script tags. This vulnerability is the root cause of Cross-Site Scripting (XSS) attacks, one of the most critical security vulnerabilities on the internet. Furthermore, unescaped characters cause syntax errors and broken web typography. HTML entity encoding translates reserved characters into safe entity representations: - **& (Ampersand):** becomes '&amp;' - **< (Less Than):** becomes '&lt;' - **> (Greater Than):** becomes '&gt;' - **" (Double Quote):** becomes '&quot;' - **' (Single Quote):** becomes '&#39;' or '&apos;' Our HTML Entity Converter provides an indispensable developer utility: 1. **Bi-Directional Conversion:** Seamlessly switch between encoding raw markup into safe entities and decoding entity-heavy payloads back into clean, readable text. 2. **Instant Live Preview:** As you edit characters, the converted output updates synchronously without page refresh. 3. **One-Click Swap:** Switch input and output with a single button for rapid round-trip verification. 4. **Zero-Server Processing:** Protects proprietary website code, email templates, and internal documentation by processing every byte strictly inside browser memory.