Most retirement decisions are really two decisions at once — take the lump sum and claim Social Security early, retire at 62 and pay for insurance until Medicare. Put the two tools next to each other and change one number at a time. Each pane is the full tool, so everything still runs in your browser and nothing you type is sent anywhere.
The address bar keeps your pairing — copy the link and it reopens with the same two tools. On a phone the panels stack, so side-by-side comparison works best on a laptop. See every tool →