Preheat the oven to 180°C (350°F) and line a large baking sheet with parchment paper.
Combine the almond flour, shredded cheddar cheese, and salt in a food processor or high-speed blender and pulse until the mixture forms a cohesive dough.
If the dough is too crumbly, add 1 tablespoon of water and pulse again; add a second tablespoon only if needed so the dough holds together.
Place a sheet of parchment on a flat surface, transfer the dough onto it, and top with a second sheet of parchment. Press the dough flat, then roll it out to about 1/4 inch thickness.
Use a pizza cutter or sharp knife to cut the rolled dough into square crackers.
Transfer the cut crackers to the prepared baking sheet and bake for about 10–12 minutes, flipping halfway through, until golden and set.
Remove from the oven and let the crackers cool completely on the baking sheet before serving.