My juniper tree.

This tree was planted almost 8 years ago as potted ornamental. Thinking it could be a material for bonsai too. Will anyone tell me if I can crop the leaves very close to the branches as I think it is too high and let it grow densed and fuller.

If you could post some better pictures where the tree is not cluttered up by the back ground. In other words we can see the evidence of a pretty nice trunk but the foliage kind of dissappears against the chaos of a similarly cluttered and colored background.

it looks like most of the foliage is very far from the main trunk(s)...

generally if you cut back a juniper, you must leave some foliage on the branch...
and then hope it back-buds closer to the main trunk(s)
(removing all the foliage will kill the branch)

knowing what type of juniper may allow some more detailed responses.