Visit badssl.com for a list of test subdomains, including:
self-signed.badssl.comexpired.badssl.comsha1.badssl.commixed.badssl.comrc4.badssl.comhsts.badssl.com
Stock Ubuntu VM, DNS A records for badssl.com. and *.badssl.com. pointing to the VM.
sudo apt-get update ; sudo apt-get install git nginx
git clone https://github.com/lgarron/badssl.com && cd badssl.com
sudo make install
sudo service nginx restart
Your user should be part of the docker group or otherwise permitted to access Docker.
sudo apt-get update ; sudo apt-get install docker.io
git clone https://github.com/lgarron/badssl.com && cd badssl.com
make docker
sudo docker run -d -p 80:80 -p 443:443 --name badssl badssl
badssl.com is meant for manual testing of security UI in web clients.
Most subdomains are likely to have stable functionality, but anything could change without notice. If you would like a documented guarantee for a particular use case, please file an issue. (Alternatively, you could make a fork and host your own copy.)
badssl.com is not an official Google product. It is offered "AS-IS" and without any warranties.