URL Encoder / Decoder – Encode & Parse URLs Online

URL encoding converts unsafe characters into a percent-encoded format. For example, a space becomes %20, & becomes %26, and = becomes %3D. This ensures the URL is valid and unambiguous when transmitted.

encodeURI() encodes a full URL — it leaves characters like ://&?#= untouched because they are valid URL syntax. encodeURIComponent() encodes everything including those characters — use it for individual query parameter values to prevent them being interpreted as URL structure.

URLs can only contain specific ASCII characters. Spaces, non-ASCII letters (like Chinese or Arabic characters), and special chars must be encoded so they can be transmitted safely. Without encoding, a & in a query value would look like a parameter separator.

The URL parser breaks any full URL into protocol, hostname, port, path, each query parameter as a key/value pair, and the hash fragment. It uses the browser's built-in URL API and requires the URL to include a protocol (e.g. https://).