Base64 Encode / Decode

Binary-safe text encoding. Switch between encode and decode modes.

URL-safe (-_ not +/)

Input

Encoded output

What is Base64?

A way to put binary into text-only channels.

Base64 encodes binary data using 64 ASCII characters (A-Z, a-z, 0-9, plus + and /). It's typically used to embed images, files, or arbitrary bytes inside text-only mediums like JSON, email (MIME), data URIs, or Basic HTTP auth headers.

Note: encoding adds ~33% overhead. Use it when you need text-safety, not as compression or encryption.