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URL Encoder/Decoder

Encode and decode URLs and query strings live, both directions. Runs in your browser.

How It Works

1

Pick a mode

Component encodes everything unsafe, for a query value or a path part. Full URL keeps the characters a link needs (: / ? # & =). Form turns spaces into + as HTML forms do.

2

Type on either side

Type plain text on the left to encode it, or paste an encoded string on the right to decode it. The other side updates live.

3

Copy the result

Copy either side. An invalid sequence, such as a lone % sign, is flagged instead of guessed.

FAQ

Component mode (encodeURIComponent) escapes every reserved character, including / ? & = and #, so the text is safe as one value inside a URL. Full URL mode (encodeURI) leaves those characters alone, so a whole link keeps its structure. To encode a value inside a query string, use Component. To clean up a whole link, use Full URL.
In a URL path and in most query strings a space is %20. HTML forms use an older rule, application/x-www-form-urlencoded, where a space is +. Form mode follows that rule when it encodes and decodes.
The text has a % that is not followed by two hex digits, or the bytes do not form valid UTF-8. A literal % must be written as %25. Fix the sequence the tool points at and the other side fills in.
Yes. Characters are encoded as UTF-8 bytes first, so 'zażółć' and emoji come out as %C5%BC-style sequences and decode back.
No. Encoding and decoding run in your browser. For a related encoding, try the Base64 encoder.

Built & Maintained by Varstatt

Varstatt is a one-person product studio run by Jurij Tokarski, product engineer since 2011. These tools are free and open — no signup, no catch.