Base64 Encode

Encode text to Base64 format

Split lines into 76 characters (used for MIME)

Encode each line separately (when you have multiple lines)

Decode from Base64 format to text

Decode each line separately (when you have multiple lines)

What is a Base64 encoding ?

Base64 encoding is a group of binary-to-text encoding schemes that represent binary data (more specifically, a sequence of 8-bit bytes) in sequences of 24 bits that can be represented by four 6-bit Base64 digits.

Common to all binary-to-text encoding schemes, Base64 is designed to carry data stored in binary formats across channels that only reliably support text content. Base64 is particularly prevalent on the World Wide Web where one of its uses is the ability to embed image files or other binary assets inside textual assets such as HTML and CSS files.

Base64 is also widely used for sending e-mail attachments. This is required because SMTP – in its original form – was designed to transport 7-bit ASCII characters only. This encoding causes an overhead of 33–37% (33% by the encoding itself; up to 4% more by the inserted line breaks). You can read more about Base64 encoding on Wikipedia.

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