How does one decode Base64? [closed]

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As seen here, they have the line ZG9udGJlYWhhdGVyc3RhcnR1cCtoYWNrZXJuZXdzQGdtYWlsLmNvbQ==.

How would one go about decoding this line of Base64?

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Base64-decode it. For example, put it in this online decoder: http://www.opinionatedgeek.com/dotnet/tools/base64decode/

BTW this is not encryption, it's encoding.

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This is a simple base64 encoding, one way to decode it is to use openssl

echo 'ZG9udGJlYWhhdGVyc3RhcnR1cCtoYWNrZXJuZXdzQGdtYWlsLmNvbQ==' | openssl base64 -d

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Use a base64 decoder. Or - specify a language you would like to use and I can give you some example code.

BTW: I decoded this using this online decoder:

http://www.convertstring.com/EncodeDecode/Base64Decode

It decodes to

dontbeahaterstartup+hackernews@gmail.com

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Base64 encoding is explained here: Base64 decoder

ZG9udGJlYWhhdGVyc3RhcnR1cCtoYWNrZXJuZXdzQGdtYWlsLmNvbQ== => dontbeahaterstartup+hackernews@gmail.com