Encode / Decode
HTML Entities
Encode and decode HTML entities locally.
About HTML Entities
HTML Entities converts reserved characters so snippets can be safely displayed in HTML and then decoded again when you need the original text.
Common uses
- Escape markup before placing it inside documentation.
- Decode copied HTML entity text from a page source.
- Check how quotes, ampersands, and angle brackets will render.
Good to know
Entity encoding helps with display safety, but application security still depends on context-aware escaping in your framework.
When to encode entities
Encode entities when you want markup to appear as text instead of being interpreted as HTML. This is useful in documentation, examples, templates, and support messages.
Context matters
Entity encoding is not the same as complete application security. Attribute values, JavaScript strings, URLs, and CSS each have different escaping rules in real applications.
Common mistakes
Double-encoding turns readable characters into noisy text. Decode once and review the result before encoding again, especially when content has passed through a CMS or email system.
Before you rely on the output
- Check whether the source expects a full document, a URL component, bytes, Unicode text, or another encoding boundary before copying the result.
- Privacy mode: inputs are processed locally in your browser and are not intentionally sent to an application server.