Percent-encode text for URLs, or decode it back.
Switch between encode and decode above, then type or paste your text. URL (percent) encoding replaces characters that are unsafe in a URL — spaces, `&`, `?`, `/`, and non-ASCII characters — with `%` escape sequences so they survive inside a query string or path segment.
This tool uses the browser’s `encodeURIComponent` and `decodeURIComponent`, which is the correct pair for encoding a single query-string value. Everything runs locally — nothing is sent to a server.
`encodeURIComponent` encodes a single value — it escapes `&`, `=`, `?`, `/`, and more, so it is right for a query-string parameter. `encodeURI` is for encoding a whole URL and deliberately leaves those structural characters intact. This tool uses `encodeURIComponent`, the one you want for a value.
In a path or with percent-encoding, a space becomes `%20`. In the older `application/x-www-form-urlencoded` form-body format, a space is encoded as `+`. This tool produces `%20`, which is valid everywhere in a URL.