Out of current NFL teamscurrent NFL teams, four have not made the Super Bowlfour have not made the Super Bowl. These are the Detroit Lions Detroit Lions (who also have had an 0-16 record0-16 record one season), Houston TexansHouston Texans (expansion team in 2002expansion team in 2002, as of 2018 newest NFL team), Cleveland Browns Cleveland Browns (who had a 1-31 stretch1-31 stretch over two seasons), an Jacksonville Jaguarsand Jacksonville Jaguars (who are in the same 4-team divisionsame 4-team division as the Houston Texans). I would argue the worst team after the Super Bowl mergerAFL-NFL merger is the Detroit Lions, and the expansion Browns are the worst if you separate them from the team that is now the Baltimore RavensBaltimore Ravens. According to WikipediaWikipedia, the Tampa Bay BuccaneersTampa Bay Buccaneers, who went 2-262-26 in their first two seasons (1976 and 1977), have the worst winning percentage of all time (.387). They beat the RaidersOakland Raiders in Super Bowl XXXVIIISuper Bowl XXXVII (3837) for their only Super Bowl.
The Lions have seven playoff wins, the Texans have three, the Jaguars have had seven, the Buccaneers have six, and the Browns have 11, but they have not been to the playoffs since 2002. They were re-established in 1999re-established in 1999. I hope that this helps!