Base64 Encoder

What is Base64 encoding?

Base64 is a binary-to-text encoding scheme. It converts binary data (files, images, etc.) into a string of 64 printable ASCII characters. This makes it safe to transmit binary data through text-based protocols like HTTP headers, JSON, XML, or email.

Common uses for Base64 encoding

• Embedding images directly in HTML or CSS as data: URLs.
• Encoding attachments in email messages (MIME).
• Storing binary data in JSON or XML documents.
• Passing binary data in URL query parameters (though URL encoding is often better for that).

Does Base64 change file size?

Yes — Base64 encoding adds approximately 33% to the size of the data. This is a trade-off for the ability to represent binary data as text.