URL Encoder and Base64 Encoder / Decoder

Choose URL or Base64 mode, pick encode or decode, and the output box updates as you type with no button press required.

Base64 handling is Unicode-safe: text is converted through UTF-8 first, so emoji and accented characters survive a round trip intact.

If a string cannot be decoded the tool tells you immediately instead of silently returning broken output, making it easy to spot truncated tokens.