Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 to text. Supports UTF-8.
What is Base64 Encoding?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's commonly used to embed images in HTML/CSS, encode email attachments (MIME), and transmit binary data over text-based protocols.
Common Use Cases
- Embedding images in HTML/CSS using data URIs
- Encoding binary data for JSON APIs
- Email attachments (MIME encoding)
- Storing binary data in text-based formats like XML
- Basic authentication headers in HTTP requests
Features
- Full UTF-8 support for international characters
- Real-time encoding/decoding as you type
- Swap button to quickly reverse input and output
- Byte size comparison between input and output
- 100% client-side — your data never leaves your browser