Browser-side utility

Base64 Encoder & Decoder (Unicode)

Encode and decode UTF-8 Unicode text to Base64 without character corruption.

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How It Works

Enter UTF-8 text (including emojis or non-ASCII characters) to encode to Base64, or paste valid Base64 to decode.

Why does standard btoa fail on Unicode?: Native btoa only accepts Latin1 strings; this tool uses TextEncoder UTF-8 byte arrays first.