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

At first: This question is extremly browser dependent! I tried many, so I came up to answer this question that way:

You should put the base64-Data inside the src-Tag of an IMG-Element: How to display Base64 images in HTML? Then you can right click the Image and click "Save Image..." (or similar) in these browsers:

• Chrome 79
• Edge 44
• Firefox 71
• IE 11
• Safari 13

Also on Android with Chrome and Firefox. Biggest file working was 23 MB PNG-File in IE 11 and Safari 13. But Firefox and Chrome did also work for 86 MB JPEG.