Some of these record collections are indexes and some include an index and images. “Index only” collections are labeled “Free Index”.
You may need to create a free account after using the free databases but this account will be free, limited, and not require a trial-membership to continue looking at the free records. Don’t submit credit card information or you’ll be signing up for a free trial that will auto-renew. And if while searching, you’re asked for a credit card number, you’re trying to search a subscription-only collection.