![]() An exception in which padding characters are required is when multiple Base64 encoded files have been concatenated. In some implementations, the padding character is mandatory, while for others it is not used. The padding character is not essential for decoding, since the number of missing bytes can be inferred from the length of the encoded text. Here is the output: SGVsbG8gd29ybGQgIQ=.īelow is how we can calculate the size of our file from base64. I created a file named base64.txt (size= 13 bytes) containing the text Hello World! and converted it to base64 using the base64 guru website. A single = indicates that the last four characters will decode to only two bytes, while = indicates that the last four characters will decode to only a single byte. ![]() ![]() The only exceptions are when padding characters exist. This short sentence is enough to calculate the corresponding file size from any base64 string. When decoding Base64 text, four characters are typically converted back to three bytes. So I had to calculate the size of the file represented by the base64 string and apply some business logic. “ Base64 is a group of binary-to-text encoding schemes that represent binary data (more specifically, a sequence of 8-bit bytes) in an ASCII string format by translating the data into a radix-64 representation.” -Wikipedia The particularity here is that: all binary data were in base64 format. One of the data types I had manipulated was binary data which had been used to store file-based data like images and documents. NET project to synchronize data between two APIs.
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