I compile a large list of visualization tools, here are all tools I have tagged "comparative" which can include synteny viewers https://cmdcolin.github.io/awesome-genome-visualization/?latest=true&tag=Comparative

I am also a developer of JBrowse 2, it does not parse collinearity files natively, but if you can convert them into a format we do support, then it might work well since JBrowse 2 allows you to interactively zoom in on a region of interest, etc.