Free crochet patterns for 18-inch doll clothes are available online at CrochetPatternCentral.com and CrochetAtPlay.com. Many patterns for 18-inch dolls are categorized as American Girl patterns.
To find free crochet patterns for 18-inch dolls at CrochetPatternCentral.com, go to the home page, and click on Free Pattern Directory. Scroll down, and select Dolls and Doll Clothes. Click on American Girl Doll/18" Doll Clothes and Accessories. The site lists dozens of free downloadable patterns, including skating costumes, Western gear, sweaters and wedding dresses.
At CrochetAtPlay.com, click on Categories, and scroll down to Barbie, Dolls & Doll Clothing. Click on Dolls American Girl. Among the dozens of free downloadable crochet patterns are patterns for bunny slippers, spring dress, nightgown and one-piece bathing suit.