Base64 decoder

Inspect Base64-encoded text during development

This decoder converts a Base64 transport value into readable text for troubleshooting. It is intended for controlled samples from APIs, fixtures, configuration files, and messages where you understand the expected character encoding.

Useful scenarios

  • Inspect an encoded field in a JSON response.
  • Check a Basic authentication test value without sending a request.
  • Confirm that padding and line wrapping were preserved.

Recommended workflow

  1. Remove labels, quotes, and prefixes that are outside the payload.
  2. Decode once and inspect the resulting characters and line breaks.
  3. Compare with an independent local implementation for important tests.

Technical example

VGVzdA== decodes to Test. Removing required padding can make strict implementations reject the same value.

Limitations and safety

Decoding is not a security operation. Never submit production secrets, session tokens, customer data, or proprietary payloads to an online utility.

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