Am i able to bare weight while in a foot brace up toy knee from a fracture on the top of foot?

Depends: For a foot fracture, it depends on the type, severity, location, and medical history. If the fracture is non displaced and you're braced to off-load that area (with stability) than it should be fine. Let pain and swelling be your guide unless you have past medical hx of nonunion, neuropathy, or other bone healing complications. Hope this helps!