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HTML Encoder & Decoder

Encode and decode HTML entities instantly in your browser

Interactive tool

Text to encode

drop a file

Encoded HTML

Read-only

What is HTML Encoding?

HTML encoding is the process of converting special characters into HTML entities. HTML entities are text representations of characters that have special meaning in HTML, such as less-than (<), greater-than (>), ampersand (&), and quotes. Encoding prevents browsers from interpreting these characters as HTML code and ensures they display correctly as text.

How to Use This HTML Encoder

  1. 1Choose "Encode" to convert text to HTML entities, or "Decode" to convert HTML entities back to text
  2. 2Paste or type your text or HTML in the input field
  3. 3For encoding, select your preferred entity format (Named, Numeric, or Hex)
  4. 4Click the "Encode" or "Decode" button to process
  5. 5Copy the result or download it as a file
What you get

Key features

Instant Conversion

Encode and decode HTML entities instantly in your browser

Multiple Formats

Support for named entities, numeric entities, and hex entities

Two-Way Processing

Both encode text to HTML entities and decode entities to text

All Entity Types

Handles all named entities and numeric character references

Entity Counter

Shows the number of HTML entities in your text

Copy & Download

Copy to clipboard or download results as files

100% Private

All processing happens in your browser, no server upload

Free Forever

No registration, no limits, completely free

Why Use HTML Encoding?

HTML encoding is essential for displaying text safely in web pages and preventing XSS (Cross-Site Scripting) attacks. When user-generated content or special characters need to be displayed on a webpage, they must be encoded to prevent the browser from interpreting them as HTML tags or scripts. This ensures security and correct display of content.

Common use cases

  • Displaying user-generated content safely on web pages
  • Preventing XSS (Cross-Site Scripting) vulnerabilities
  • Encoding special characters in HTML attributes
  • Displaying code examples on web pages
  • Processing form data before database storage
  • Cleaning and sanitizing HTML input
  • Converting between different entity formats
  • Debugging HTML entity issues in web development

Understanding HTML Entities

HTML entities start with an ampersand (&) and end with a semicolon (;). There are three types: named entities like &amp; for ampersand, decimal numeric entities like &#38;, and hexadecimal numeric entities like &#x26;. All three represent the same character but in different formats.

Common HTML Entities

  • &lt; - Less than sign (<)
  • &gt; - Greater than sign (>)
  • &amp; - Ampersand (&)
  • &quot; - Double quotation mark (")
  • &#39; - Single quotation mark (apostrophe)
  • &nbsp; - Non-breaking space
  • &copy; - Copyright symbol (©)
  • &reg; - Registered trademark symbol (®)

Security Considerations

Always encode user-generated content before displaying it on web pages. This prevents malicious users from injecting scripts or HTML code that could compromise your website security. HTML encoding is a critical defense against XSS attacks, one of the most common web vulnerabilities.

Pro tips

Tips & best practices

Always encode user input

Never display user-generated content without encoding it first. This prevents XSS attacks.

Choose the right entity format

Named entities are more readable. Numeric entities support all Unicode characters.

Decode for readability

Use decoding when you need to read encoded HTML or debug entity issues.

Test with special characters

Test your encoding with quotes, apostrophes, and angle brackets to ensure proper handling.

Double encoding warning

Be careful not to double-encode text. Encoding already encoded text creates nested entities.

Built for trust

Privacy & security

This HTML encoder and decoder runs entirely in your web browser. Your data is never uploaded to any server, stored in any database, or transmitted anywhere. All conversions happen locally on your device using native browser APIs. It is 100% private and secure.

Related tools

Frequently Asked Questions

What is HTML encoding?

HTML encoding is the process of converting special characters into HTML entities. These entities are text representations that prevent browsers from interpreting characters as HTML code. For example, the less-than sign (<) is encoded as &lt; to display it as text rather than starting an HTML tag.

When should I use HTML encoding?

You should use HTML encoding whenever you need to display user-generated content, special characters, or code examples on web pages. It is essential for preventing XSS (Cross-Site Scripting) attacks and ensuring content displays correctly without breaking your HTML structure.

What is the difference between named and numeric entities?

Named entities use readable names like &amp; for ampersand and &lt; for less-than. Numeric entities use character codes, either decimal (&#38;) or hexadecimal (&#x26;). Both represent the same character, but named entities are more readable while numeric entities support all Unicode characters.

Is HTML encoding the same as encryption?

No, HTML encoding is not encryption. It is a text representation format that makes special characters displayable in HTML. Anyone can easily decode HTML entities back to the original text. Never use HTML encoding as a security measure for sensitive data.

Does this tool prevent XSS attacks?

Yes, properly encoding user input before displaying it on web pages is a critical defense against XSS attacks. This tool helps you encode special characters that could be used to inject malicious scripts. However, always implement server-side validation and encoding as well for complete security.

Is my data safe when using this tool?

Yes, this HTML encoder and decoder runs entirely in your web browser using native browser APIs. Your data is never uploaded to any server or stored anywhere. All conversions happen locally on your device, making it completely private and secure.