URL-kodare och avkodare

URL encoding (percent-encoding) replaces characters that aren't allowed or have a special meaning in URLs with a % followed by two hex digits. A space becomes %20, & becomes %26 and é becomes %C3%A9 (its UTF-8 bytes).

Encode a component (a single query value or path segment) in almost all cases; this escapes /, ?, & and = so they can't break the URL. Use full-URL mode only to clean up a complete address that contains spaces or non-ASCII characters while keeping its structure.

HTML forms encode spaces in query strings as +. Both are valid in that position. The decoder treats + as a space when “Treat + as space” is checked.

No. Encoding, decoding and URL parsing all happen in your browser.