Place chopped kiwi, sugar, lemon juice, and a pinch of salt in a saucepan.
Stir everything together.

Set the pan over medium heat and bring the mixture to a gentle boil.
Stir frequently.

Reduce the heat slightly and simmer for 20–25 minutes, stirring often, until thickened and jam-like.
Remove from heat.

Mash the kiwi for a chunky jam, or use an immersion blender for a smoother texture.
Transfer to a clean glass jar and store in the refrigerator for up to 2 weeks.