Base64 Encode / Decode
Encode text to Base64 or decode Base64 back to text. Handles Unicode correctly.
Input
Output
Output will appear here...
About Base64
Base64 encodes binary data into ASCII characters using a 64-character alphabet (A–Z, a–z, 0–9, +, /). It increases the size by ~33%.
This tool handles Unicode text correctly by encoding to UTF-8 bytes first, then to Base64. All processing happens in your browser — nothing is sent to a server.