Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 strings back to readable text with UTF-8 support.
Online Base64 Encoder & Decoder
Encode plain text to Base64 or decode Base64 strings back to readable text. Unlike simple btoa/atob tools, this encoder properly handles multi-byte UTF-8 characters including Chinese, Japanese, emoji, and accented letters.
Common Use Cases
- Encoding binary or text data for JSON and XML API payloads
- Creating Base64 data URIs to embed images in HTML/CSS
- Encoding credentials for HTTP Basic Authentication
- Transferring data through email or text-only protocols