If the total number of bits isn't divisible by 6, the encoder adds "padding" (the = character) to the end to ensure the string is the correct length. Why Use Base64 Encoding?
The answer is . Many legacy systems, email protocols (MIME), and URLs were designed to handle only text, not raw binary. If you try to send a raw image file through a text-based system, the system might interpret certain bytes as control characters (like "end of file"), causing the data to corrupt. Common Use Cases:
You might wonder: If encoding makes the file size about 33% larger, why do we use it? base64 encoder
Loading assets directly in the browser without external files. Email Attachments: Sending non-text files via SMTP.
is designed to change the format of information so it can be consumed by different systems. If the total number of bits isn't divisible
Each value is mapped to its corresponding character in the Base64 index table.
Quick for one-off tasks like encoding a small snippet of text or a favicon. Programming Languages: Many legacy systems, email protocols (MIME), and URLs
The process is a mathematical transformation of bits. Here is the step-by-step breakdown: