HTML Entity Encoder & Decoder
Encode HTML special characters to entities and decode HTML entities back to text free online. Convert <, >, &, and " instantly — no signup, browser-based.
How to Use HTML Entity Encoder & Decoder
- 1Paste your text or HTML into the input panel.
- 2Click Encode HTML to convert special characters (<, >, &, ") to HTML entities.
- 3Click Decode HTML to convert HTML entities back to readable plain text.
- 4Use the Swap button to move the output back to input for further processing.
- 5Copy the result with the Copy button.
About HTML Entity Encoder & Decoder
This tool lets you encode HTML special characters online free with one click. Paste any text containing <, >, &, or " and click Encode HTML — every unsafe character converts to its entity equivalent (<, >, &, ") instantly. Click Decode HTML to reverse the process and read entity-encoded source back as plain text.
As an HTML escape tool online, this is essential for safely embedding user-generated content in web pages, preventing cross-site scripting (XSS) by ensuring characters that have structural meaning in HTML cannot be interpreted as markup. It also handles the full Unicode entity set, including named entities like ©, ™, —, and .
The Swap button moves output back to input in one click, making it easy to encode, check the result, then decode to confirm the round-trip is correct.
No installation, no account, no data sent anywhere — everything runs locally.
How HTML Entity Encoder & Decoder Works
The HTML Entity Encoder & Decoder converts characters that have special meaning in HTML — such as <, >, &, ", and ' — into their safe entity equivalents (<, >, &, ", ') and vice versa. When encoding, every character that could be misinterpreted by an HTML parser is replaced with its named or numeric entity. When decoding, all named entities ( , ©, ®), numeric decimal entities (©), and numeric hex entities (©) are converted back to their original characters. This is essential for safely displaying user-generated content in a web page, embedding code snippets in blog posts, or preparing strings for safe insertion into HTML templates.
Who Uses This Tool and Why
- ✓Web developers encode user-submitted content before rendering it in HTML to prevent XSS (Cross-Site Scripting) attacks that exploit unescaped angle brackets or quotes.
- ✓Technical bloggers and documentation writers encode code snippets containing < and > characters so they display correctly inside <pre> and <code> blocks without being parsed as HTML tags.
- ✓Email template designers encode special characters and non-ASCII symbols in HTML email bodies to ensure consistent rendering across email clients.
- ✓CMS administrators decode HTML entities in database exports to restore human-readable text when migrating content between platforms.
- ✓Localisation engineers encode accented and non-Latin characters as numeric HTML entities to ensure correct display in legacy systems with limited charset support.
Limitations & Practical Tips
Known Limitations
- •HTML entity encoding prevents XSS only when applied in the correct context. Encoding alone is not sufficient for safe insertion into JavaScript strings, CSS, or URL parameters — each context requires its own escaping strategy.
- •The tool encodes all non-ASCII characters as numeric entities by default. If you need a specific named entity (e.g. é instead of é), check the HTML entity reference.
- •Decoding entities in untrusted content and then re-rendering the result can re-introduce injection vulnerabilities — always re-encode before output.
Tips for Best Results
- →Always encode user input at the point of output (when inserting into HTML), not at the point of input. Input encoding can corrupt data stored in databases.
- →For modern web apps, prefer Content Security Policy (CSP) headers alongside output encoding as a defence-in-depth approach against XSS.
- →Use the decode mode to quickly read entities in minified HTML or database exports that are hard to read with encoded characters.
Frequently Asked Questions
- What are HTML entities and why do I need them?
HTML entities are special codes used to display reserved or special characters in HTML without breaking the markup. For example, < must be written as < in HTML source, otherwise the browser interprets it as the start of a tag. Entities prevent XSS vulnerabilities and ensure correct rendering.
- What is the difference between named, numeric, and hex entities?
Named entities use readable names: & for &. Numeric entities use the decimal code point: & for &. Hex entities use the hexadecimal code point: & for &. All three produce identical output in browsers. Named entities are most readable; numeric/hex support any Unicode character.
- When should I encode HTML entities?
Always encode user-supplied content before rendering it as HTML to prevent XSS (Cross-Site Scripting) attacks. Also encode special characters in email templates, XML documents, and any context where < > & " can cause parsing issues.
- What is the most important HTML entity to know?
& (ampersand &) is the most critical because it introduces all entities. If you include a literal & in HTML (e.g. in a URL query string), it must be written as &. Failure to encode it can cause rendering errors and is flagged by HTML validators.
- Does HTML entity encoding prevent XSS attacks?
Encoding the characters &, <, >, ", and ' prevents most reflected XSS attacks in HTML content contexts. However, XSS prevention requires context-aware encoding: URL encoding in href attributes, JavaScript escaping inside