Have a base64 string from an API or an email? Rebuild it into the original file and download it.
If a colleague or an API hands you a base64 blob of a PDF, image, or archive, this tool reconstructs the original bytes. If the string includes a data:…;base64, prefix we use its MIME type for the file extension; otherwise you set the filename.
The entire decode happens in your browser with atob and Blob. Your data never leaves the page.