Base64 to Base64Url Converter & Encoder

Instantly convert, encode, and visually compare Base64 strings for URL safety.

Diff Visualizer

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Why do these differ?

Standard Base64 uses the characters +, /, and = for padding. These characters have special meaning in URLs (e.g., + is a space, / is a path separator).

Base64Url is designed to be safe for URL parameters by:

  • Replacing + with -
  • Replacing / with _
  • Dropping the = padding characters

This tool performs these transformations safely in real-time within your browser.

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