URL Encode / Decode

Encode and decode URL query components client-side.

How to use

1Paste text or a query value into the input box.
2Click Encode to apply percent-encoding (encodeURIComponent), or Decode to reverse it.
3Copy the result when you need it in a URL, or Clear to start over.
4Plus signs in encoded query strings are treated as spaces when decoding.

Is processing done locally?

Yes. URL encode and decode run in your browser. Your text is never uploaded.

Encode vs encodeURI?

This tool uses encodeURIComponent, which is correct for query parameter values. It encodes characters like &, =, and /.

Why is Decode failing?

Malformed percent sequences (for example %ZZ) will throw an error. Fix the encoding and try again.

Will this break my full URL?

Encode individual parameter values, not the entire URL including https://, or reserved separators may be escaped too.