Free online text transformation tools
Base64 Decode converts a Base64-encoded string back to its original plain text. Use it to read Base64-encoded API responses, decode JWT payload sections, inspect encoded credentials, or simply reverse a Base64 encoding. All processing happens in your browser.
Valid Base64 strings have lengths that are multiples of 4, padded with "=" if necessary. If decoding fails, check that your input is complete and correctly padded.
This tool decodes to text (UTF-8). Binary data decoded as text may appear garbled. For binary files, use a dedicated file-based Base64 decoder.