javascript - How to download a base64-encoded image?

Question

I have a base64-encoded image from the server for which I want to force the download through JavaScript. Is is possible?

Answer 1

1. If you want to download it using JavaScript (without any back-end) use:

   window.location.href = 'data:application/octet-stream;base64,' + img;
   

   where img is your base64 encoded image.

2. If you want to allow the user to specify a file name, use the download attribute of the a tag:

   <a download="FILENAME.EXT" href="data:image/png;base64,asdasd...">Download</a>
   

   • Notice: The download attribute is not supported by very old browsers