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Base64 Decode

Decode Base64 encoded strings back to original content. Restore Base64 data to readable format.

Base64 Input

Paste encoded string to decode

0 characters

Decoded Output

Original content

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Paste Base64 encoded data to decode

Decoding Statistics

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About Base64 Decoding

Base64 decoding converts a Base64 encoded string back to its original binary or text data. Base64 encoding is commonly used to transmit binary data over text-based protocols like email or HTTP.

  • Base64 encodes 3 bytes into 4 ASCII characters
  • Decoding reduces size by approximately 33%
  • Padding characters (=) indicate incomplete byte groups
  • Safe for binary data embedded in JSON, XML, or URLs
  • All processing happens locally in your browser