How do I display base64 image in flutter?

This way the PDF file gets send, not its base64 encoding . PDF files contain typically binary data. In XSLT only http://www.w3.org/TR/REC-xml/ s can be processed. This is the reason why you cannot have the PDF file itself in XLST, only its base64 encoding.

Dart has a function in the package:crypto library, CryptoUtils. bytesToBase64 , which takes a list of bytes to encode as base64. In order to get the list of bytes from a Dart string, you can use the UTF8. encode() function in the dart:convert library.

To decode with base64 you need to use the –decode flag . With encoded string, you can pipe an echo command into base64 as you did to encode it. Using the example encoding shown above, let’s decode it back into its original form. Provided your encoding was not corrupted the output should be your original string.

Base64 is an encoding, the strings you’ve posted are encoded. You can DECODE the base64 values into bytes (so just a sequence of bits). And from there, you need to know what these bytes represent and what original encoding they were represented in, if you wish to convert them again to a legible format.

How to convert Base64 to PDF. Open free Base64 website and choose Convert application . Click inside the file drop area to upload Base64 files or drag & drop Base64 files. Click on Convert button.