How does Base64 decoding work?

Base64 decoding takes 4 characters from the 64-character alphabet, extracts the 6 bits each represents (totaling 24 bits), and converts them back into 3 original 8-bit bytes of text.

Base64 Decoder — Decode Base64 to Plain Text Online (UTF-8)

How to Use the Base64 Decoder

Paste Base64 String

Paste your encoded Base64 string into the input area.

Inspect Decoded Output

The decoded plain text appears instantly.

Copy Decoded Text

Copy the decoded text with a single click.

Why Choose Our Base64 Decoder?

Accurate UTF-8 character decoding

Automatic padding detection

Graceful error handling for corrupted inputs

100% private in-browser decoding

Pro Tips for Best Results

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Frequently Asked Questions

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