URL Encoder/Decoder

Component encoding (the default) escapes reserved characters such as slashes, question marks, and ampersands, which is right for a query value or path segment. Uncheck the option to use full URL encoding, which keeps the structural characters of a complete URL intact.

The plus form comes from the classic encoding of HTML form query strings. Check "Encode spaces as +" when your target system expects that convention, for example older form processors; %20 is the safer general-purpose choice.

Yes. Conversion runs on every keystroke and every option change, entirely in your browser, and the counters below each box show character counts plus how much larger or smaller the result is.

Plus signs are first converted to spaces, then the text is decoded. If strict decoding fails, the tool retries a more lenient pass before showing an error, so partially encoded strings usually still come through.

It exchanges the input and output text and flips the mode at the same time, so you can instantly verify a round trip from plaintext to encoded value and back.