HTML ASCII Encoder & Decoder

HTML ASCII Encoder & Decoder is an online tool that converts each character in your text into an HTML numeric character entity (format: &#N;), and supports decoding them back to readable text.

What Are HTML Numeric Character Entities?

An HTML numeric character entity represents a character using its Unicode code point in decimal, written as &#N;. For example:

• Letter A → A
• Letter a → a
• Symbol < → &#60;
• Chinese character 中 → &#20013;

Unlike named entities (such as < or &), numeric entities can represent any Unicode character and do not depend on the browser recognizing a specific entity name.

Key Features

• Encode: Converts every character in the input text into its &#N; numeric entity form, ready for use in HTML documents.
• Decode: Converts &#N; encoded text back into the original readable characters.

Use Cases

• Content Obfuscation: Encode email addresses or contact details to reduce direct harvesting by bots and scrapers.
• Cross-system Compatibility: Transmit non-ASCII characters (Chinese, Japanese, special symbols) through legacy systems or protocols that only support ASCII.
• Frontend Debugging: Verify how browsers parse and render numeric entity codes.
• HTML Templates: Escape characters using numeric entities to ensure correct rendering across all browsers.

How to Use

1. Enter or paste text into the input field.
2. Click HTML Encode to convert each character into a &#N; numeric entity. The result appears in the output field.
3. Or paste encoded text into the input field and click HTML Decode to restore the original characters.
4. Click Clear to reset both fields.

Frequently Asked Questions

Q: What is the difference between numeric entities and named entities like &lt;?

Named entities only cover a predefined set of characters and require browser support for their names. Numeric entities work for any Unicode character universally. This tool uses numeric entity format.

Q: Can I paste the encoded output directly into HTML?

Yes. Browsers automatically parse &#N; into the corresponding character and display it correctly without any extra processing.

Q: Are Chinese characters supported?

Fully supported. Chinese characters have larger Unicode code points (e.g., 中 = 20013), but the resulting numeric entities are valid HTML and render correctly in any Unicode-capable browser.