Encoder / Decoder
Base64, URL, Unicode and more. Runs locally in your browser.
Encoder / decoder
Base64
UTF-8 supported. Extra whitespace is ignored on decode.
URL
Encode special characters to %XX for URLs and query parameters.
Unicode escape
Encode to \uXXXX / \u{...} and decode both forms.
HTML entities
Convert < > & to entities like < > &.
Hex
UTF-8 bytes to hex. Input can include spaces or 0x.
JSON string escape
Escape a string as JSON (with quotes) or unescape it.