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Base64 Decode

Decode Base64 strings into readable text when you need to inspect encoded developer data, headers, fixtures, or payload fragments.

Paste Base64 to begin.
Ctrl or Command + Enter decodes the text.0 chars
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What this tool does

Base64 Decode turns encoded Base64 text back into readable content. That helps when an auth header, fixture, or encoded snippet needs to be inspected quickly during debugging.

Common use cases

  • Inspecting encoded values in a developer workflow.
  • Checking payload fragments before reuse.
  • Verifying whether a string decodes to the expected text.
  • Reviewing Base64 data before passing it into another tool.

How to use this tool

  1. Paste a Base64 string into the input panel.
  2. Click Decode Base64.
  3. Copy the readable output or use the encode action to reverse the transformation.

FAQ

Can I reverse the decode on this page?

Yes. This page includes the encode action too.

Why does decoding fail?

The input may not be valid Base64, or it may contain truncated data.

Is Base64 secure?

No. Base64 is only an encoding format.

Does this work with UTF-8 text?

Yes. The decoder supports UTF-8 text.