What is Base64?
Base64 is a group of binary-to-text encoding schemes that represent binary data in sequences of 24 bits that can be represented by four 6-bit Base64 digits and is designed to carry data stored in binary formats across channels that only reliably support text content. This encoding causes an overhead of 33–36%. (Wikipedia)
About Base64 Decoder
Base64 encoder/decoder is a tool that you can use to convert plain text to Base64 encoded text represenation that supports encoding selection and convert line by line mode. To begin using it, put your text in the input box and click Encode/Decode to start converting.