Only encode <, >, &, ", and '
Get up and running in 30 seconds
Copy text containing special characters, HTML markup, or encoded entities and paste it into the input panel. The tool handles both plain text encoding and entity-encoded text decoding.
Select Encode to convert special characters to HTML entities (&, <, >) or Decode to convert entities back to readable characters. Both named entities (&) and numeric entities (&) are supported.
When encoding, choose which characters to convert: Special only (& < > " '), All characters (full ASCII), Named entities (&), or Numeric entities (&).
Click Copy to copy the encoded or decoded result to your clipboard, ready for HTML templates, XML documents, or text processing.
Understanding HTML entities
HTML entities are special codes used to represent characters that have special meaning in HTML or characters that aren't easily typable on keyboards. Entities prevent HTML parsing errors and ensure text displays correctly across all browsers and character encodings.
HTML uses certain characters for markup syntax - angle brackets (< >), ampersands (&), and quotes (" '). When these characters appear in text content rather than markup, they must be encoded as entities to prevent browsers from misinterpreting them as HTML tags or attributes. For example, & becomes & and < becomes <.
HTML entity encoding prevents Cross-Site Scripting (XSS) attacks, one of the most common web security vulnerabilities. When user-generated content contains HTML tags or JavaScript, encoding these characters neutralizes the code. Input like <script>alert('XSS')</script> becomes <script>alert('XSS')</script>, displaying as text rather than executing.
Content management systems and templating engines automatically encode user input before rendering it in HTML. Understanding entities helps developers debug rendering issues, verify security measures are working, and handle edge cases where automatic encoding isn't sufficient.
Internationalization requires entity encoding for special characters outside the ASCII range. Copyright symbols (©), currency symbols (€ £ ¥), accented characters (é ñ ü), and mathematical symbols (× ÷ ±) all have HTML entity representations that ensure consistent display regardless of page encoding.
Named Entities: Human-readable entity names like & for ampersand, < for less-than, © for copyright symbol. Named entities are easier to remember and read in source code but only cover commonly-used characters.
Numeric Entities: Character codes in decimal (&) or hexadecimal (&) format. Numeric entities can represent any Unicode character, making them universal but less readable than named entities.
Special Character Entities: Five critical entities prevent HTML parsing errors: & (&), < (<), > (>), " ("), and ' ('). These must be encoded when they appear in text content or attribute values.
Developers use HTML entity encoding when sanitizing user input before database storage, preventing XSS in comment sections or user profiles, displaying code snippets in HTML pages (escaping < > for code examples), handling internationalized content with special characters, and debugging HTML rendering issues caused by unencoded special characters.
Entity decoding is necessary when extracting text from HTML for search indexing, converting HTML email content to plain text, processing XML/HTML data in APIs, or displaying human-readable text from encoded database values.
How developers use HTML entities
Encode user-generated content before displaying in HTML to prevent Cross-Site Scripting attacks. Malicious scripts become harmless text when entities are encoded.
Show HTML, XML, or code snippets in web pages by encoding angle brackets and special characters. Code examples render as text rather than being parsed as markup.
Encode special characters from non-English languages, currency symbols, and mathematical notation to ensure consistent display across all browsers and character encodings.
Encode special characters in text before storing in databases to prevent SQL injection and ensure data can be safely rendered in HTML later.
Master all features
This HTML entity tool provides instant client-side encoding and decoding with zero server uploads. All processing happens in your browser using JavaScript, ensuring your content remains private and processing is instantaneous.
Paste text containing special characters (& < > " ') into the input panel. Select Encode mode and choose your encoding preference: Special Characters only (encodes & < > " ' for safety), All Characters (encodes entire ASCII range), Named Entities (& format), or Numeric Entities (& format).
The encoder processes text instantly, converting special characters to their entity equivalents. The output is safe for insertion into HTML attributes, element content, or XML documents without parsing errors or security vulnerabilities.
Paste text containing HTML entities (like <div> or &) into the input panel. Select Decode mode. The decoder recognizes both named entities (©) and numeric entities (©) and converts them back to readable characters.
The decoded output displays human-readable text with special characters restored. This is useful for extracting plain text from HTML, processing encoded database values, or converting HTML email content to readable format.
Selective Encoding: Choose which characters to encode. "Special only" encodes just the five critical HTML characters, minimizing entity usage. "All characters" encodes the complete text for maximum safety in untrusted contexts.
Named vs Numeric: Named entities (©) are human-readable and easier to debug in HTML source. Numeric entities (©) are universal and work for any Unicode character, including emoji and rare symbols.
Reference Table: The tool includes a comprehensive reference showing common characters, their named entities, numeric codes, and descriptions. Use this as a quick lookup when writing HTML manually.
Bidirectional Conversion: Switch between Encode and Decode modes to verify conversions. Encode text, then decode it to ensure the transformation is reversible and accurate.
Always encode user-generated content before inserting into HTML to prevent XSS attacks. Use named entities for common symbols (copyright, trademark, currency) for better source code readability. Use numeric entities for rare characters or symbols without named equivalents. Test encoded HTML in multiple browsers to verify rendering consistency. Remember that entities only protect against HTML parsing issues, not all security threats - use Content Security Policy (CSP) and proper validation alongside encoding.
Everything you need to know
Your content never leaves your browser
Your content never leaves your browser. This HTML entity encoder/decoder operates entirely client-side using JavaScript string processing in your web browser. There are no server uploads, no backend processing, and no data transmission to any external services.
This makes the tool safe for sensitive use cases like encoding user data with personally identifiable information (PII), sanitizing comments with confidential content, processing proprietary HTML templates, or any content that must remain confidential. Use with confidence for security audits, XSS prevention testing, or handling regulated data.
While HTML entity encoding is a crucial XSS defense, it's not sufficient alone. Use comprehensive security frameworks that provide context-aware escaping (different escaping for HTML content, attributes, JavaScript, CSS, URLs). Implement Content Security Policy (CSP) headers to block inline scripts. Validate and sanitize input on the server side. Defense in depth is essential for web application security.
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