Gridiron Sim is a free browser-based NFL franchise simulator. No install, no ads, no microtransactions, no login. Pick a team, call your plays, sign free agents, navigate the draft, build a dynasty across decades.
Runs in any modern browser on mobile or desktop. Built for fans of Football Manager, Out of the Park Baseball, Front Office Football, and old-school Madden franchise mode.
Play now at gridironsim.dev — JavaScript required.