Base64 Decoder

Decode Base64 strings back into readable text.

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How it works

Base64 characters are mapped back to bytes, then decoded as UTF-8 text.

Examples

InputOutput
SGVsbG8sIFdvcmxkIQ==Hello, World!
Zm9vfoo
dGVzdA==test

Frequently Asked Questions

Why do I get an error?

The input contains characters outside the Base64 alphabet or wrong padding.

Can it decode binary files?

This tool decodes to text; binary payloads need byte-level handling.

Is Base64 secure?

No — decoding is trivial. Never treat Base64 as protection for secrets.

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