A Base64 Encoder converts binary or text data into a text-based format using 64 ASCII characters. It encodes data in 6-bit chunks and ensures the output length is a multiple of 4 using padding (=). Common uses include data transmission, embedding images in HTML, and storing binary data in text formats. However, Base64 is not encryption and should not be used for secure data protection.

A Base64 Decoder converts Base64-encoded text back into its original binary or text format. It works by mapping each character to its 6-bit value and reconstructing the original data. Base64 decoding is used in data transmission, file storage, and embedding assets in web applications. Since Base64 is not encryption, decoded data remains readable and should not be used for security purposes.