URL Encoder & Decoder

Percent-encoding replaces characters that are unsafe in a URL with % followed by the hexadecimal code of each byte, per RFC 3986.

Component versus full URI

Mode	Function	Example input
Component	encodeURIComponent — also encodes : / ? # & =. For a single query value or path segment.	iced coffee&tea
Full URI	encodeURI — leaves URL separators intact. For encoding a whole URL.	https://x.com/a b?q=1

Example

iced coffee & tea  ->  iced%20coffee%20%26%20tea   (Component mode)

Notes

• On Decode, an invalid percent sequence (e.g. %zz) shows an error message.
• Spaces become %20; the + form for spaces only applies inside application/x-www-form-urlencoded.