The contents of any file dropped in this box remain in your browser.
Only a digest of your file (a long number) is sent to our server so we can check it is authentic.
Alternatively you can email the files to test@dummybank.co.uk and we will reply in a few seconds with the results. This is less confidential than using the web site as we need to store your file whilst we compute the hash. We delete your files from our servers before we reply to your email. So when you receive the reply you can be sure we have deleted them.
Enter details you want on the certificate in the fields below. They are optional.