Convert URL to File or Blob for FileReader.readAsDataURL
To convert a URL to a Blob for FileReader.readAsDataURL() do this: var request = new XMLHttpRequest(); request.open(‘GET’, MY_URL, true); request.responseType=”blob”; request.onload = function() { var reader = new FileReader(); reader.readAsDataURL(request.response); reader.onload = function(e){ console.log(‘DataURL:’, e.target.result); }; }; request.send();