Base64 to File Decoder
Decode Base64 text back into a file.
Text back into a file
Base64 text encodes a file as characters, and decoding reverses it, turning the text back into the original file. This decodes Base64 into a downloadable file, in your browser, so nothing is uploaded.
Paste Base64 text to decode it into a file.
Recovering the original file
Decoding Base64 is the counterpart to encoding, and it comes up whenever file data has been stored or transmitted as text and needs to become a usable file again. You might receive Base64 in an API response, find it embedded in data or configuration, or need to extract a file that was encoded to travel through a text-only channel. Decoding reconstructs the exact original file — the process is lossless, so the recovered file is byte-for-byte identical to what was encoded. Knowing the file's actual type helps, so it can be saved with the right extension and opened correctly, since the Base64 itself does not always carry that. This is a routine developer task when working with encoded data, and doing it in the browser means even sensitive encoded data is turned back into a file locally, without uploading, so the whole round trip from file to text and back stays private on your own device.
Frequently asked questions
Is decoding Base64 lossless?
Yes — decoding reconstructs the exact original file, byte for byte identical to what was encoded, since Base64 encoding loses nothing.
When do I need to decode Base64?
When file data has been stored or sent as text — in an API response, embedded in data, or encoded to travel through a text-only channel — and needs to become a usable file.
Is my data uploaded?
No. The decoding happens in your browser, so nothing leaves your device.