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base64 Encode / Decode
base64 is a data encoding scheme whereby binary-encoded data is converted to printable ASCII characters. It is defined as a MIME content transfer encoding for use in internet e-mail. The characters used are A–Z, a–z and 0–9 with the "+" and "/" symbols. The "=" symbol as a special suffix code.
Full specifications for base64 are contained in RFC 1421 and RFC 2045 - MIME (Multipurpose Internet Mail Extensions). The scheme works on 8 bit data. The resultant base64-encoded data has a length that is greater than the original length by the ratio 4:3.
Three bytes are concatenated, then split to form 4 groups of 6-bits each; and each 6-bits gets translated to an encoded printable ASCII character, via a table lookup. An encoded string is therefore longer than the original by about 1/3. The "=" character is used to pad the end out to an even multiple of four.
i To Encode plain text paste it in the top box.
i To Decode base64 to plain text, paste the base 64 code in the bottom box.
This software will not encode binary data but it will decode binary coded base64.
Paste text into EITHER one OR the other box (not both).
PLAIN TEXT TO ENCODE
BASE64 TO DECODE