Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 strings. Supports UTF-8 text encoding.

Text to Encode

Base64 Output

How to Use Base64 Encoder/Decoder

Select Encode or Decode mode
Enter your text or Base64 string
Click the convert button
Copy the result or download as a file
Use Swap to quickly reverse the conversion

What is Base64?

Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's commonly used to encode data that needs to be stored or transferred over media that are designed to deal with text.

Common Use Cases

Encoding images for embedding in HTML/CSS
Encoding data for URLs and APIs
Email attachments (MIME)
Storing complex data in cookies
Basic authentication headers

Features

Supports UTF-8 text encoding
Real-time input/output length tracking
Quick swap between encode/decode
One-click copy and download
Works entirely in your browser - no data is sent to any server