URL encode & decode.

Percent-encode text for a URL or decode it back — component mode for query values and path segments, full-URL mode that keeps ://, ?, and & intact. Two-way and live.

Escape the value, not the structure

The whole game with URL encoding is keeping a value from being mistaken for structure. An ampersand inside a search term has to become %26 or it splits your query string into two parameters; a slash in an ID has to be escaped or it looks like another path segment. Component mode escapes those separators; full-URL mode leaves them alone because in a complete URL they are the structure. Pick the wrong one and you either break a working URL or silently corrupt a value.