Can I Predefine a Suggested Filename for Data URI Downloads?

Specifying a Suggested Filename for data: URI Downloads

When downloading a file from a data URI, browsers typically prompt the user to choose a filename. Is it possible to specify a suggested filename within the hyperlink?

In Markup

Yes, you can use the download attribute:

<a download="FileName" href="data:application/octet-stream;base64,SGVsbG8=">

The download attribute is supported by Chrome, Firefox, Edge, Opera, desktop Safari 10 , iOS Safari 13 , but not IE11.

In JavaScript

If the download attribute is not supported, you can use JavaScript to simulate the download and specify the filename:

const blob = new Blob(['Hello'], { type: 'text/plain' });
const url = URL.createObjectURL(blob);

const a = document.createElement('a');
a.href = url;
a.download = 'FileName.txt';
a.click();

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