National Center for Home Food Preservation

The gold standard for home canning science in the United States. Run by the University of Georgia, the NCHFP maintains the most current USDA-tested canning guidelines available to the public — free, searchable, and updated as food safety research evolves. Every tested recipe on this site has been laboratory-verified for safety. If you want to know the correct processing time for a specific food at a specific altitude, or whether a particular recipe is safe for water bath versus pressure canning, this is the primary reference. Bookmark it before you need it.