Someone sent you an .ifc and you have no Revit, no Navisworks, nothing installed. You don't need it: IFC is an open format and you can open it in your browser in under a minute — no account, and the file never leaves your device.
Open my IFC now — free About the viewer
No. Geoma processes the IFC locally in your browser (WebAssembly). Nothing goes out to the internet — which matters when the model is under NDA or belongs to a public contract.
With the same file open you can measure distances and areas, pull quantities to Excel, edit properties in batch, merge several IFC files or export to DXF. Viewing and measuring are free; the rest unlocks with a licence from €19/month.