To use the vSphere Client for free, you actually need to download and install , the hypervisor that runs your virtual machines.
The VMware vSphere Client 7.0 is a critical administrative interface used to manage ESXi hosts and vCenter Server instances. With the release of version 7.0, VMware fully transitioned to the HTML5-based vSphere Client, deprecating older Flash-based interfaces to provide a faster, more secure, and cross-platform experience. Accessing the vSphere Client vsphere client 7.0 download free