Any free or public url to upload image to test

Actually many a times we develop and write some POCs & test codes and need to upload some files on web to test for correct implementation. If we get some free URLs / public urls where no other setting are required just pass the url+filenmae and it will upload the file.(I agree the file size will a constraint, limiting to some MB is enough. In my case less than 1 mb is enough.) This will be quick to test.

However we can test it on some other servers but the configuration takes a lot of time like username, password, proxy, cookies, etc etc.

Is there any free or public url where we can upload an image to test?

Any help is highly appreciated.