Base64 Decoder

Decode base64-encoded text into text or binary, using just your browser. View the decoded value or download it as a file. (You can use our client-side base64 encoder to try it out!)

This decoder works for both regular and URL-safe encodings.

Privacy and Confidentiality
This decoder runs entirely in the browser—it does not send any data to any server for decoding. Learn more.
What is Base 64 Decoding?

Base64 is a way of representing binary data in an ASCII string.

‘Base64 decoding’ is the process of transforming a base64 representation — a string of odd-looking text — back into the original binary or text data.

Wikipedia has a good expalanation of what base64 encoding and decoding involves.

Load the base64 data to decode from a file, then press the ‘Decode’ button:


Alternatively, type or paste in the text you want to base64–decode, then press the ‘Decode’ button.