I want to find the best trading routes but It'll take too long to randomly explore for the right jump holes, I need a site that shows complete Freelancer Discovery nav maps?
Use FL Companion. Not only will it extract data from your freelancer installation giving you complete maps, you can also use it to work out profit/time ratios of different trade routes to find the "best" routes. You can download it here. Make sure to set the freelancer directory to your Discovery install though, as it will automatically set to the vanilla install to begin with.
click
settings and tick "set freelancer directory"
4.86 is not using the normal microsoft games/freelancer directory it uses your "C:\Users\#your user login name here #\AppData\Local\Discovery Freelancer 4.86.0\EXE