Technology
Convert data between formats developers work with often: Base64 text encoding and binary, decimal and hexadecimal numbers.
Encode or decode text as standard Base64, or convert whole numbers between binary, decimal and hexadecimal.
Decoding a Base64-encoded string, or converting a hexadecimal colour value to decimal.
Conventions and limitations
Both tools work entirely on text you type. Neither accepts a file upload, and Base64 here is an encoding, not encryption.