what is base64 encoding

Quick Scoop

Base64 encoding is a way to turn binary data into text using a fixed set of 64 characters, so it can be safely sent through systems that expect plain text. It is widely used for things like email attachments, image data, and tokens in web apps.

What it does

• It converts data into readable ASCII text.

• It works by splitting bytes into 6-bit chunks and mapping those chunks to characters from a 64-character alphabet.

• The encoded result is larger than the original, commonly about 33% bigger.

Why people use it

• Some systems cannot handle raw binary safely, but they can handle text.

• Base64 helps move images, files, certificates, and other binary data through text-only channels.

• It is an encoding, not encryption, so it does not hide the data or make it secure by itself.

Simple example

If a program needs to send a file through JSON or email, it can Base64-encode the file first, send it as text, and decode it back on the other side. That is why it shows up so often in web development and networking.

TL;DR

Base64 is a text-safe way to represent binary data, useful for transport and storage, but it adds size and is not a security method.