StackToolkit

Base64 Encoder/Decoder

Encode and decode Base64 strings for data transmission

Base64 Encoder

Convert text or data to Base64 format for safe transmission

Input Text

Enter text to encode or upload a text file

Base64 Result

Base64 encoded result

Common Examples

Click any example to try it out

Text to Encode

Base64 to Decode

About Base64 Encoding

Common Use Cases

  • • Email attachments (MIME)
  • • Data URLs for images
  • • API authentication tokens
  • • JSON Web Tokens (JWT)
  • • Binary data in XML/JSON
  • • URL-safe data transmission

Character Set

A-Z: Values 0-25
a-z: Values 26-51
0-9: Values 52-61
+: Value 62
/: Value 63
=: Padding character