How to Convert an Object URL to a File or Blob for Upload?

Retrieving a File/Blob from an Object URL

During drag-and-drop or other image loading operations, object URLs are often used to display images. However, when integrating these images into a form for upload, reversing the object URL into a File or Blob may be necessary.

Modern Solution:

With the introduction of the Fetch API, retrieving a blob from an object URL can be simplified:

<code class="javascript">let blob = await fetch(url).then(r => r.blob());</code>

This method works seamlessly with both object URLs and regular URLs.

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