URL Encode

Percent-encodes text using the same rules as JavaScript's `encodeURIComponent`, replacing every character that isn't a letter, digit, or one of `- _ . ! ~ * ' ( )` with a `%` followed by its hexadecimal byte value, so the result is safe to place inside a URL.

Type or paste text, a query string, or a full URL into the input box; the percent-encoded output appears automatically below it. Copy it with the copy button when you're ready to use it.

Encoding `a b&c=1` produces `a%20b%26c%3D1`: the space becomes `%20`, the ampersand becomes `%26`, and the equals sign becomes `%3D`, since all three have special meaning in a URL's query string.

Characters like `& = ? #` are left encoded rather than passed through, which is exactly what's needed when placing a value inside a query parameter — encoding a whole URL's reserved structural characters would break it, so this tool is meant for individual values, not entire URLs.

This tool encodes spaces as `%20`, matching the URI percent-encoding standard used in paths and most query values; some older systems instead expect `+` for spaces in `application/x-www-form-urlencoded` form bodies specifically, which is a different, narrower convention.

This encodes one string at a time and does not parse or validate URL structure — it will not tell you whether the surrounding URL is well-formed, only produce a percent-encoded version of what you provide.

Encoding runs entirely in your browser via client-side JavaScript; the text you enter is never uploaded to a server or stored.