Base64 Validator

Base64 String Input
Validation Results
Enter a Base64 string to validate
Information

What is Base64 Validation?

Base64 validation ensures that a string follows the proper Base64 encoding format. Valid Base64 strings contain only specific characters and proper padding.

Our validator checks for:

  • Valid Base64 character set (A-Z, a-z, 0-9, +, /)
  • Proper padding with '=' characters
  • Correct string length (multiple of 4)
  • No invalid characters or whitespace
  • Proper encoding structure
Base64 Validator

Base64 Validation Rules

A valid Base64 string must follow these rules:

  • Character Set: Only A-Z, a-z, 0-9, +, and / are allowed
  • Padding: Strings may end with 0, 1, or 2 '=' characters
  • Length: Must be a multiple of 4 characters (after padding)
  • No Whitespace: No spaces, tabs, or line breaks allowed

How to Use the Base64 Validator

  1. Input: Paste your Base64 string in the input field
  2. Validate: Click "Validate Base64" or validation happens automatically
  3. Review: Check the validation results and details
  4. Fix Issues: Use the feedback to correct any problems

The validator provides detailed feedback about any issues found in your Base64 string.