I copy and paste the answer from StackOverflow because of background info about blob in URL string.
Blob can not be converted to
a "normal" URL.
blob: URL does not refer to data the exists on the server, it refers
to data that your browser currently has in memory, for the current
page. It will not be available on other pages, it will not be
available in other browsers, and it will not be available from other
Therefore it does not make sense, in general, to convert a Blob URL to
a "normal" URL. If you wanted an ordinary URL, you would have to send
the data from the browser to a server and have the server make it
available like an ordinary file.
It is possible convert a blob: URL into a data: URL, at least in
Chrome. You can use an AJAX request to "fetch" the data from the blob:
URL (even though it's really just pulling it out of your browser's
memory, not making an HTTP request).