Base64 String

Encode/decode Base64 text (UTF-8 safe).

Input
Output

Related Encoder / Decoder tools

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Escape/unescape backslash sequences.
X.509 Certificate Decoder
Decode X.509 / PEM certificates.

About the Base64 String

What does the Base64 String do?
Encode/decode Base64 text (UTF-8 safe). GeekTool runs the Base64 String entirely in your browser — input never leaves your device.
Is the Base64 String free?
Yes. The Base64 String is part of GeekTool, a free suite of 50+ developer utilities. No sign-up, no ads inside the tool, no quotas.
Does the Base64 String send my data to a server?
No. All processing is client-side JavaScript. Your input stays in your browser tab — we never see it.