What is Base64 Encode?

A tool that converts text data into ASCII string format. Use it to safely transfer text in web applications, API communications, email, and various other environments.

Conversion results appear in real-time as you type.

How to Use

Enter the data you want to encode in the left text area and it will automatically convert to Base64 format, displaying results on the right.

Encoding Options

Encode Line by Line

Choose how to process multi-line text.

• Enabled - Encode each line individually (convenient for batch processing)
• Disabled - Encode entire text including newlines as a single unit

Convert to URL-safe Format

Standard Base64 contains characters like + and / that can cause issues in URLs.

• Enabled - Replace + with - and / with _ for URL-safe format
• Disabled - Use standard Base64 format

Use Cases

• Web applications - Embed text data directly in HTML
• API data transfer - Safely transmit text with special characters
• Email communication - Send encoded text data
• Authentication tokens - Use in authentication tokens like JWT
• URL parameters - Include in query parameters using URL-safe format

How Base64 Works

Base64 encoding represents data using 64 printable ASCII characters (A-Z, a-z, 0-9, +, /) and = for padding.

Original data: Man
Binary: 01001101 01100001 01101110
6-bit groups: 010011 010110 000101 101110
Base64 conversion: T W F u

For details, refer to RFC 4648.