CMD batch - encode file to base64 and trim characters and new line

Question

I\'m trying to make a batch file from CMD with the following commands:

1. Convert file to base 64 - using certutil command this is how the contents of the base

Answer 1

There is a really simple solution using undocumented features of CERTUTIL. You can use the
-ENCODEHEX verb with an undocumented format at the end to directly get your desired output of base 64 all on one line without any headers.

certutil -encodehex -f sample.pdf B64.txt 0x40000001

See the DosTips More Tricks with certutil thread for more information. Especially look at this 4th post for a detailed explanation of all the format options.