"Many a times we require to convert a file into Base64 and then to decode it. Base64 encoded files are used at so many places, many Greasemonkey scripts also require you to convert images into base64 first.
OpinionatedGeek has online solution to quickly encode a binary file to Base64 representation. You can either upload a file or can directly encode a text from there. You can also decode the text output you got after encoding
Online Base 64 Encoder
Online Base 64 Decoder
You can convert any binary file (jpg, png, gif, doc, ppt, xls etc) with this online tool" whibb.com