Nah, my browser tells me it's insecure.
It works in Chrome, and Firefox claims to support data URIs when directly navigated to by the user. Are you on Edge? If it lets you override the warning you should be fine.
There’s no substitute for a thorough audit of course, but if you’re worried you’ve been MITM’ed the MD5 is:
5ad110542ebf6a3fbae7840260b0bee5I giggled! ^_^