URL Encoder / Decoder
Percent-encode any string for use in URLs — or decode one back to readable text.
Output
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Component vs Full URI
Component (encodeURIComponent) escapes characters that have a special meaning in URLs: & = ? / # +. Use this when you're encoding a single query parameter value.
Full URI (encodeURI) leaves URL-structure characters alone. Use this when you have a full URL and just want to escape spaces and Unicode.
Common quirks
- Plus signs in query strings — historically, + in a query string is decoded as a space (form-encoding convention). Our decoder honors this.
- Already-encoded input — double-encoding is silent and ugly. %2520 means "encoded percent-2-0" and decodes to "%20", not a space. If you re-encode an already-encoded string, you get this.