About this HTML Entity Encoder & Decoder
HTML Entity Encoder & Decoder is a quick utility for viewing or preparing text that includes characters with special meaning in HTML.
Formula or method
Encoding converts &, <, >, double quotes and apostrophes to HTML-safe entity forms; decoding reverses valid entities.
Example
“<strong>” becomes “<strong>” when encoded.
Common uses
- Display HTML tags as text in documentation.
- Decode entity-heavy copied content.
- Check common HTML character escaping.
How to use this tool
- Enter the values or text requested by the calculator.
- Choose units or options when the tool provides them.
- Select the calculation button and review the result.
- Use the formula, example and notes on this page to check whether the result fits your situation.
Important note
Encoding text does not sanitize arbitrary HTML code for every security context; use proper server-side escaping when building applications.
Frequently asked questions
Does this make arbitrary HTML safe?
No. It is a convenience encoder/decoder, not a complete application security sanitizer.
Which characters are encoded?
The included encoder handles the common HTML-sensitive characters &, <, >, double quote and apostrophe.