Base64 Encoder & Decoder

Encode text to Base64.

Base64 SGVsbG8=

Formula: Groups of 3 bytes become 4 Base64 characters

Step-by-step with your numbers:

1. Values used:

3. Base64 = SGVsbG8=

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Base64 encodes binary or text data using 64 safe characters.

The math behind it

Every 3 bytes (24 bits) split into four 6-bit groups, each mapped to a Base64 character.

Hello becomes SGVsbG8=.

Why use Base64?

To send binary data safely through text-only channels like email or URLs.