kmarkdownwebview from home:wolfi323:KDE:Extra project
Select Your Operating System
Add repository and install manually
For openSUSE Leap 42.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:wolfi323:KDE:Extra/openSUSE_Leap_42.3/home:wolfi323:KDE:Extra.repo zypper refresh zypper install kmarkdownwebview