Base64 Decode

Decode Base64 strings back to text

Base64 Decoding

Base64 decoding is the reverse process of Base64 encoding — it converts a Base64-encoded ASCII string back to its original binary data or text.

When Do You Need to Decode Base64?

  • Inspecting JWT token payloads
  • Reading encoded email attachments
  • Decoding data URIs
  • Debugging API responses that contain Base64 data
  • Viewing encoded configuration values

Frequently Asked Questions

How do I decode Base64?

Paste a Base64 string into the input field and click 'Decode'. The tool will convert it back to readable text.

How do I know if a string is Base64?

Base64 strings contain only letters (A-Z, a-z), digits (0-9), plus (+), slash (/), and may end with padding (=). They are often multiples of 4 characters long.

Is my data safe?

Yes. All decoding happens in your browser. No data is sent to any server.