Base64 Encoder / Decoder

What is Base64 Encoding?

Base64 is a binary-to-text encoding method that converts binary data into ASCII text format. It is commonly used when transmitting data through systems that are designed to handle text rather than binary content.

For example, images, files, or other binary data can be encoded into Base64 so they can be safely transferred through email, APIs, or web applications.

How Base64 Encoding Works

Base64 encoding converts binary data into a set of 64 ASCII characters. These characters include uppercase letters, lowercase letters, numbers, and two additional symbols.

ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghijklmnopqrstuvwxyz
0123456789
+ /

The encoding process takes groups of binary data and maps them into these characters. Because of this conversion, Base64 encoded data becomes about 33% larger than the original binary data.

How to Use the Base64 Encoder

1. Paste your text into the input field.
2. Click Encode to convert text into Base64.
3. Click Decode to convert Base64 back to plain text.
4. Copy the result instantly.

Example Base64 Encoding

Original text:

Hello World

Base64 encoded version:

SGVsbG8gV29ybGQ=

This encoded text can be transmitted safely through systems that only support plain text.

Common Uses of Base64

• Email attachments (MIME encoding)
• Embedding images in HTML or CSS
• Data URLs in web applications
• API data transmission
• Authentication tokens