Base64 (.b64)

Background & Context

Import["file.ext.b64"] imports a Base64-encoded .ext file.
Export["file.ext.b64",expr] exports an expression to a Base64-encoded .ext file.
Import["file.b64"] decodes a Base64-encoded file and imports its contents as an expression, automatically inferring the format from the file contents.
The import format can be given explicitly with Import["file",{"Base64","format"}].
Import["file.ext.b64",elem] imports the specified element from a Base64-encoded .ext file.
Import["file.ext.b64",{elem,sub_a,sub_b,…}] imports a subelement.
Import["file.ext.b64",{{elem₁,elem₂,…}}] imports multiple elements.
The import format and file encoding can be explicitly specified with Import["file",{"Base64","format",elems₁,elems₂,…}].
Export["file.ext.b64",expr,elem] creates a Base64-encoded .ext file by treating expr as specifying element elem.
Export["file.ext.b64",{expr₁,expr₂,…},{{elem₁,elem₂,…}}] treats each expr_i as specifying the corresponding elem_i.
Export["file.ext.b64",expr,opt₁->val₁,…] exports expr with the specified option elements taken to have the specified values.
Export["file.ext.b64",{elem₁->expr₁,elem₂->expr₂,…},"Rules"] uses rules to specify the elements to be exported.
The export format and file encoding can be explicitly specified with Export["file",exprs,{"Base64","format",elems}].
See the following reference pages for full general information:

	Import, Export	import from or export to a file
	CloudImport, CloudExport	import from or export to a cloud object
	ImportString, ExportString	import from or export to a string
	ImportByteArray, ExportByteArray	import from or export to a byte array

General Import elements:
"Elements" list of elements and options available in this file

"Summary" summary of the file

"Rules" list of rules for all available elements