In the absence of a physical model, how can I use free software to visualize stereochemistry?
I used Jmol to make the following animated GIF:

First I used NCBI's Pubchem Sketcher to get the SMILES code for the molecule: CC(C(C(C)F)(Br)F)O
Then, I loaded it into JSmol running here using the load molecule by name button.
Internally, this triggers the command
load /*file*/&quot;https://cactus.nci.nih.gov/chemical/structure/CC(C(C(C)F)(Br)F)O/file?format=sdf&amp;get3d=true
I fixed the stereochemistry by clicking on the carbons with incorrect chirality after issuing the command &quot;set picking INVERTSTEREO&quot;. To rotate around the bonds, I used &quot;rotate branch @3 @2 180 180&quot; and &quot;rotate branch @3 @4 180 180&quot;. Finally, I chose the viewing orientations, displayed the orientationwith &quot;show moveto&quot; and issued the resulting moveto commands before and after rotating around the single bonds.
A more elaborate example with glucose (4 chiral centers) can be found on Proteopedia.