Base64 Decode: workflow and output
Turn standard Base64 text back into a downloadable binary file. Use it when you have a known encoded payload and need to recover its original bytes.
How to use Base64 Decode
- Save only the Base64 payload in a text file.
- Choose it and process the decoding.
- Download the BIN file and use the expected original extension only when you know its type.
Example and result checks
The sample payload QWxwaGEgQmV0YQ== decoded to the exact bytes for “Alpha Beta”. The decoder does not guess whether the content is an image or another file.
What this tool does not do
A complete data: URL prefix is not accepted as the payload. URL-safe Base64 variants and malformed text may need conversion before they can be decoded.
Troubleshooting and choosing the right workflow
If Invalid Base64 appears, remove unrelated text and check padding. Never open an unknown decoded file just because decoding succeeded.
Related workflow
File Info offers a different operation; choose it only when that result matches your task.
Processing and privacy: This workflow processes selected input in your browser. Required libraries or models can load from third-party hosts. Keep the original file, review the output and read our Privacy Policy before working with sensitive information.