URL / Base64 / Base64-URL / hex encoder
Encode and decode between text and URL-percent / Base64 / Base64-URL (RFC 4648 §5) / hex, with a single shared input that toggles direction in one click.
/tools/encoders handles the four encodings you keep Googling for: URL percent-encoding (RFC 3986), standard Base64 with padding, Base64-URL (-, _, no padding — RFC 4648 §5), and plain hex.
Pick the mode, toggle encode/decode, and the same input box drives both directions — useful when you’re iterating between formats. The encoders run locally: TextEncoder, btoa/atob, and hand-rolled hex. UTF-8 round-trips through TextDecoder so accented characters and emojis survive correctly. Hex input is forgiving: spaces and newlines are stripped, case-insensitive.
Errors are inline and explicit — paste invalid Base64 in decode mode and you’ll see a precise message rather than a silent fail.