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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
- 1Select Encode or Decode mode
- 2Upload the file
- 3Download the resulting .txt (encode) or original file (decode)
Why use AppSofts' 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.
Learn more about Base64 Encoder / Decoder
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