Encoding

Base64 Decoder

Decode standard Base64 into UTF-8 text with malformed-input checks.

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UTF-8 text output

Choose “Decode Base64” to see the result here.

Processed in your browser. Inputs stay in this page’s memory and are not uploaded or saved.

Use the standard + and / alphabet with required = padding and no whitespace.
Text is encoded as UTF-8 bytes. Decoding rejects bytes that are not valid UTF-8.

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Decode standard Base64 into UTF-8 text with malformed-input checks. Input: Base64 input. Output: UTF-8 text output (UTF-8 text).

Enter base64 input, then choose “Decode Base64”. Review the result and use Copy to copy the displayed text. Clear removes all fields and the result.