Compost Check is a United States-focused resource that helps people make informed composting choices and build practical skills. Its free online checker covers more than 10,000 items, providing guidance on whether materials can be composted. An AI-powered analyzer also offers general advice on preparation and greener alternatives, while noting that local composting rules may differ.

The site’s Compost Encyclopedia provides detailed information about compostable and non-compostable items, and the Compost Academy offers guides, tutorials, learning paths, and step-by-step courses. Visitors can also access composting recipes, method comparisons, a calculator, garden tools, and a free 100-item compost cheat sheet. For readers seeking a more comprehensive reference, Compost Check sells The Complete Composting Bible, a 230-page ebook with a 250-item reference, charts, diagrams, and photos.

Its shop features products across 29 categories, including composting supplies, soil and water testing, organic inputs, planters, garden tools, and sustainable home goods. Compost Check aims to make composting easier and support more sustainable everyday choices.