Encode input string and file to BASE64.
Base64 encoding is a method of encoding binary data into an ASCII string format. It is used to encode data that may not be readable by humans, such as images, audio, and video files, into a format that can be easily transmitted over the internet.
Base64 specifies a binary-to-text encoding scheme that represents binary data in an ASCII string format by translating it into a radix-64 representation. The encoding process converts groups of 3 bytes into 4 characters, each representing 6 bits of the original data. The resulting string is padded with one or two equal signs to ensure that the length of the encoded data is a multiple of 4.
Base64 encoding is commonly used in email attachments, data URLs, and other applications where binary data needs to be transmitted as text. It is also used in web development to embed images and other binary data directly into HTML, CSS, and JavaScript files.