Will a VPN slow down my internet connection?

No. A good VPN gateway that is both close to you geographically and hosted at major internet hubs should not cause any noticeable difference in speed or functionality. However, if you are choosing gateways in some far off distant land, and they are not hosted at major international datacenters, then you should expect some noticeable reduction in speed. Also, gateways can only serve an amount of traffic within it’s limitations. At NodeVPN we only use the fastest major international hubs and never overload our infrastructure, scaling where required as our userbase increases in each region.