Base64 Encoder/Decoder
Encode text or files to Base64, or decode Base64 back to its original form. Supports URL-safe encoding and file uploads.
Options
Output will appear here after conversion...
Understanding Base64 Encoding
Base64 is a binary-to-text encoding scheme that represents binary data using 64 ASCII characters. It's widely used to safely transmit binary data through text-based systems like email, URLs, and JSON.
Data URLs
Embed images and files directly in HTML/CSS using data: URLs with Base64 encoded content.
API Payloads
Send binary data in JSON API requests by encoding it as Base64 strings.
Safe Transmission
Ensures binary data isn't corrupted when transmitted through text-only channels.
When to Use Base64
Good Use Cases
- Embedding small images in HTML/CSS
- Sending binary data in JSON APIs
- Encoding data for URL parameters
- Email attachments (MIME encoding)
Consider Alternatives For
- Large files (use direct file uploads)
- Sensitive data (use encryption instead)
- Performance-critical applications
- When binary transfer is possible
Privacy & Security
All encoding and decoding happens entirely in your browser. Your data never leaves your device and is not sent to any server. Note that Base64 is not encryption - it's just encoding. Don't use it to protect sensitive information.