Yes, Agar Agar is halal. It is derived from red seaweed and is a suitable substitute for animal gelatin, making it permissible for both halal and vegetarian diets.

Explanation:

1. Source:
   • Agar Agar is extracted from red seaweed, which is a plant-based source.
2. Use:
   • It is used as a thickening agent in soups, jellies, ice cream, and other food products, making it a perfect halal and vegetarian alternative to beef or pork gelatin.
3. Halal Compliance:
   • Since it is plant-based and not derived from animals, it meets the halal dietary requirements.

Source: Wikipedia

And Allah knows best.