How can I decode a base64 string from the command line?

If you have ever needed to quickly decode or encode base64, Linux has a command line utility called base64 that works great. I’ll show you how it works!

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To encode text to base64, use the following syntax:

$ echo -n 'devilzlinux.blogspot.com' | base64
ZGV2aWx6bGludXguYmxvZ3Nwb3QuY29tCg==

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To decode, use base64 -d. To decode base64, use a syntax like the following:

$ echo -n  ZGV2aWx6bGludXguYmxvZ3Nwb3QuY29tCg== | base64 -d
devilzlinux.blogspot.com

Note: if on OS X, use capital D:
echo -n ZGV2aWx6bGludXguYmxvZ3Nwb3QuY29tCg== | base64 -D


same work with another way

python

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python -m base64 -d <<< "ZGV2aWx6bGludXguYmxvZ3Nwb3QuY29tCg=="

devilzlinux.blogspot.com 

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perl

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perl -MMIME::Base64 -ne 'printf "%s\n",decode_base64($_)' <<< "ZGV2aWx6bGludXguYmx

vZ3Nwb3QuY29tCg=="

devilzlinux.blogspot.com 

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openssl

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openssl base64 -e <<< 'Welcome to openssl wiki'

 V2VsY29tZSB0byBvcGVuc3NsIHdpa2kK



openssl base64 -d <<< 'V2VsY29tZSB0byBvcGVuc3NsIHdpa2kK'

Welcome to openssl wiki

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