URL Encoder & Decoder — Free Percent-Encoding Tool 2026

URL Encoder & Decoder

Mode: Component (query params) Full URL (preserve ://)

Input

Output

Query string parser

URL encoding reference

Character	Encoded	Notes
space	%20 or +	%20 in paths; + in form data
&	%26	Separates query params
=	%3D	Separates key from value
+	%2B	Encode + to avoid space confusion
/	%2F	Path separator — encode in values
#	%23	Fragment identifier
@	%40	Used in userinfo of URL

Frequently Asked Questions

encodeURI encodes a full URL — it leaves :/?#[]@!$&'()*+,;= unencoded because they have meaning in a URL structure. encodeURIComponent encodes a single URL component (like a query parameter value) — it encodes those same special characters so they can safely appear inside a value without being misinterpreted. Use encodeURIComponent for individual values; encodeURI for a full URL you want to sanitize without breaking.

%20 is the RFC 3986 standard for encoding a space in a URL. The + notation comes from HTML form encoding (application/x-www-form-urlencoded), where + means space in a query string. Both are valid in query strings, but they can't be mixed freely. Most modern APIs accept both, but to be safe: use %20 in path segments and either in query strings (+ is more compact). This tool uses %20 for full URL mode and %20 for component encoding.