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Base64 Encoder / Decoder

Upload any file to encode it as Base64 text, or upload a .txt file containing Base64 data to decode it back to the original binary. Useful for embedding files in JSON, YAML, or source code.

🔒 Processing happens in your browser — files are never uploadedFree · No sign-up required

How to Use

  1. 1Select Encode or Decode mode
  2. 2Upload the file
  3. 3Download the resulting .txt (encode) or original file (decode)
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Why use ShowPro's Base64 Encoder / Decoder?

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100% Private
Files never leave your browser. Zero server uploads.
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Instant Results
Processing happens locally — no waiting for uploads.
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Completely Free
No account needed. Use 5 times per day, always free.

Frequently Asked Questions

What file types can I encode?

Any file type. The output is always a plain .txt file containing the Base64 string.

Is there a file size limit?

Large files work but Base64 output is roughly 33% larger than the input.