Base64 Encoder
Encode text and binary data to Base64 format with full Unicode support
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Why Use Our Base64 Encoder?
Full Unicode support
Binary file encoding
Safe for transmission
Standard across all platforms
Technical Details
Encoding: RFC 4648 Base64 standard
Character set: A-Z, a-z, 0-9, +, /
Padding: Uses "=" padding characters
Expansion: Input increases by ~33% in size
Common Use Cases
Email Attachments
Encode binary files for safe transmission in email (MIME).
Data URLs
Embed images and files directly in HTML/CSS using data: URLs.
API Payloads
Safely include binary data in JSON API requests and responses.
Basic Auth Headers
Encode credentials for HTTP Basic Authentication headers.
Pro Tips
- Base64 is not encryption - it's just encoding
- Use URL-safe Base64 (replace + with - and / with _) for URLs
- Data URLs use format: data:[mime];base64,[encoded]
Example
Input
Hello World
Output
SGVsbG8gV29ybGQ=
Frequently Asked Questions
Encoding: RFC 4648 Base64 standard
Your data stays in your browser
All processing happens locally. Nothing is sent to any server.