Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to text. UTF-8 safe, 100% in your browser.

🔒 Everything runs in your browser. Nothing is uploaded.

Examples

helloaGVsbG8=base64encode
aGVsbG8=hellobase64decode
café ☕Y2Fmw6kg4piVbase64encode
Y2Fmw6kg4piVcafé ☕base64decode

How it works

Available operations: Encode to Base64, Decode from Base64.

Everything runs locally with the same code that passes our automated correctness tests — no server, no upload.