In the NFL playoffs, ties are obviously not an option. Someone has to win, so the overtime format does differ from what we see in the regular reason.
NFL playoff overtime is played in 15-minute periods until a winner is declared — unlike the regular season, which is a 10-minute period that ends in a tie if a winner isn’t declared. If the score is still tied (or if a team is continuing the second possession), there would be an additional overtime period.
Each team gets an opportunity to possess the ball unless a touchdown or safety is scored on the first possession.
There are no challenges in overtime as all replay stoppages will come from the booth.
Each team gets three timeouts during a half. There are two-minute intermissions between overtime periods.
A quick refresher on the OT rules.