Base64 Encoder / Decoder
Encode text to Base64 or decode it back. Everything runs in your browser, nothing gets sent anywhere.
Encoded output will appear here...
Try these examples
About this tool
Base64 is a way to represent binary data as ASCII text. You'll run into it when working with data URIs, JWT tokens, API authentication headers, email attachments, and embedded images. This tool lets you quickly encode or decode without leaving your browser.
Converts as you type, no button needed
Switch between encode and decode with one click
Swap output back to input to go the other direction
Handles Unicode text properly (UTF-8)
Copy result to clipboard instantly
Runs entirely in your browser, nothing leaves your device