How to convert an Appian Document (image) to a Base64 string?

Meme02 said:

Is there a built-in Appian expression function to convert a Document to a Base64 string?

There is no OOTB way to convert an Appian Document to Base64 not via expression functions, Web API, or Integration calls.
The best and simplest approach is to use the documentToBase64String function from the More Document Tools plugin

Shubham Aware said:

use the documentToBase64String function from the More Document Tools plugin

Thanks, I had somehow missed that there is (again) a plug-in that allows us to do this.  I know there are system overhead implications but there are some corner use cases that will be much easier with this sort of capability present.

Shubham Aware  Mike Schmitt 

Thank you for your support.
I tried this plugin and it worked successfully.

Meme02 said:

I tried this plugin and it worked successfully

Thanks for confirming / verifying.  I haven't stress-tested this plugin yet, but please note that it claims to support binary files only up to ~820 KB, which would be a pretty modestly-sized picture in general (though for a JPG this can vary greatly depending on resolution and compression factor).

Edit: despite what the plug-in disclaimers about size, I just successfully used it on a ~1.3MB test mp3 file as well as a ~3MB text file, and successfully decoded the resulting base64 values in an online converter - so there is probably some flexibility with respect to the total size it accepts (though this could have engine performance implications, so I suggest treading lightly).

Meme02 said:

I tried this plugin and it worked successfully

Thanks for confirming / verifying.  I haven't stress-tested this plugin yet, but please note that it claims to support binary files only up to ~820 KB, which would be a pretty modestly-sized picture in general (though for a JPG this can vary greatly depending on resolution and compression factor).

Edit: despite what the plug-in disclaimers about size, I just successfully used it on a ~1.3MB test mp3 file as well as a ~3MB text file, and successfully decoded the resulting base64 values in an online converter - so there is probably some flexibility with respect to the total size it accepts (though this could have engine performance implications, so I suggest treading lightly).