![]() ![]() Base64 is a popular method to get binary data into ASCII characters, which is widely understood by the majority of networks and applications.Ī common real-world scenario where Base64 encoding is heavily used are in mail servers. To work around this limitation, you can encode your data to text, improving the chances of it being transmitted and processed correctly. ![]() For example, 10110001 must be processed differently if it represents a letter or an image. This is because the meaning of a sequence of 1s and 0s is dependent on the type of data it represents. However, some communication channels and applications are not able to understand all the bits it receives. In computers, all data of different types are transmitted as 1s and 0s. With that deeper understanding of how it works, let's look at why would we Base64 encode our data. To Base64 encode a string, we convert it to binary sequences, then to decimal sequences, and finally, use a lookup table to get a string of ASCII characters. You can verify this result with an online converter. Continuing this lookup for all decimal values, we can determine that "Python" is represented as UHl0aG9u when Base64 encoded. Then we look at 7 and observe it's mapped to H. ![]() Using our last result, we get the following decimal values: 20 7 37 52 26 6 61 46Īs you can see, the value 20 corresponds to the letter U. With our data in groups of 6 bits, we can obtain the decimal value for each group. If that occurs, we have to pad the sequence. Note: Sometimes we are not able to group the data into sequences of 6 bits. We now re-group the 8-bit binary sequences into chunks of 6 bits. Recall that Base64 characters only represent 6 bits of data. The ASCII values of the characters P, y, t, h, o, n are 15, 50, 45, 33, 40, 39 respectively. Let's see how it works by converting the string "Python" to a Base64 string.
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