I googled it right before commenting, I was going to put komodo but turns out the saltwater croc is way bigger.

Here’s from the wiki:

The saltwater crocodile is the largest living reptile.[5] Males can grow up to a weight of 1,000–1,500 kg (2,200–3,300 lb) and a length of 6 m (20 ft), rarely exceeding 6.3 m (21 ft).