Base64 Encoder/Decoder: Why Your Data Needs to be Encoded for the Web

Understand Base64 encoding, when to use it, and how it helps transfer data safely across the web.

What is Base64 Encoding?

Base64 is a binary-to-text encoding scheme that converts binary data into ASCII characters.

Why Use Base64?

  1. Email attachments: MIME encoding for binary files
  2. Data URLs: Embed images directly in HTML/CSS
  3. API data: Safely transmit binary data in JSON
  4. Authentication: Basic auth headers

How It Works

Base64 uses 64 characters (A-Z, a-z, 0-9, +, /) to represent binary data. Every 3 bytes become 4 characters.

Common Use Cases

Embedding Images in CSS

background-image: url(data:image/png;base64,iVBORw0KGgo...);

API Authentication

Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ=

Important Note

Base64 is encoding, NOT encryption. It's easily reversible and should never be used for security.

Encode and decode with our Base64 Tool!