Base64 Encode / Decode
Handles Unicode correctly (the part most online tools botch).
Enter the required values above to see your result.
How the Base64 Encode / Decode works
The calculation follows the standard method used across the US — no shortcuts, no hidden assumptions. Here is exactly what happens behind the scenes:
Frequently Asked Questions
How does the Base64 Encode / Decode work?
Enter your numbers above and results update instantly using standard formulas, computed entirely on your device.
Is the Base64 Encode / Decode free to use?
Yes — completely free with no signup required, and it works on phones, tablets, and desktops.