Base64 Decoder

A Base64 decoder is a utility or algorithm designed to reverse the process of Base64 encoding. Base64 encoding is a method of representing binary or textual data using a set of 64 ASCII characters, which are a combination of uppercase and lowercase letters, digits, and two additional characters (usually '+' and '/'). The purpose of Base64 decoding is to convert this encoded data back to its original form.

The decoding process involves taking the Base64-encoded data and converting it back to binary representation. Each character in the Base64 string corresponds to a specific 6-bit value, and these values are combined to reconstruct the original binary data. The decoded binary data is then converted back to its original format, whether it's plain text, binary data, or another data type that was initially encoded.

Base64 decoding is commonly used in various applications, including handling data received in Base64-encoded format, decoding attachments in email messages, and processing data in web applications. It provides a reliable means of reversing the encoding process and retrieving the original data from its Base64 representation.