Toolwise

Base64 Decoder

Paste a Base64-encoded string to instantly decode it back to its original text.

How to use Base64 Decoder

  1. 1Paste the Base64 string into the input.
  2. 2The decoded text appears instantly.
  3. 3If the input isn't valid Base64, an error is shown.

About Base64 Decoder

This tool decodes Base64-encoded strings back into their original text, entirely client-side.

Benefits

  • • Quickly inspect what's inside a Base64-encoded token, config value or data URI.

Common mistakes

  • • Pasting a string with extra whitespace or line breaks, which can cause decoding errors.

Frequently Asked Questions

This tool is optimised for decoding Base64 back to readable text. For binary files, the decoded output may not display correctly as text.

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