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Code & Web

Decoders

Decode standard or URL-safe Base64 into strict UTF-8 text and reject malformed alphabets or invalid byte sequences.

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Decoders

Decode standard or URL-safe Base64 into strict UTF-8 text and reject malformed alphabets or invalid byte sequences.

Base64 UTF-8 DecoderDecode standard Base64 or unpadded Base64URL text locally, normalize whitespace and padding, reject malformed alphabet data, and require the decoded bytes to be valid UTF-8. Useful for developers, analysts, and anyone working with encoded API responses, JWT tokens, or data URLs. Supports both padded and unpadded variants with instant browser-side processing.Code & Web / DecodersTry it

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EncodersFile ConvertersEncodingMarkup