We check this website, now qr-code-generator.com is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is qr-code-generator Down Right Now? - NO! qr-code-generator is up!
If you have problem with access to site qr-code-generator, and domain qr-code-generator.com is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).