URL Encoder / Decoder

All computation runs locally in your browser. Nothing is uploaded to any server.

URL Encoder / Decoder

Percent-encode and decode URL components, query strings, or full URLs. Auto-detects already-encoded input.

Why did ? become %3F?

Encoding rules (RFC 3986)

Unreserved A-Z a-z 0-9 - _ . ~ Unreserved (kept as-is): A-Z a-z 0-9 - _ . ~
Reserved ! * ' ( ) ; : @ & = + $ , / ? # [ ] Reserved: ! * ' ( ) ; : @ & = + $ , / ? # [ ] — encoded in component mode
Always encode space → %20 Always encode (in component mode): space → %20, plus all reserved characters

URL Encoder / Decoder

Percent-encode and decode URL components, query strings, or full URLs. Auto-detects already-encoded input.

Tags: url encoder, url decoder, percent encoding, url decode, urlencode online, encode uri, decode uri, percent-encoding, url escape, url unescape, url 编码, 百分号编码, url 解码, codificador url, decodificador url, codificacion porcentaje, codificador url, decodificador url, codificacao percentual, encodeur url, decodeur url, encodage pourcentage