Lego's customer service site features a database of over 3300 downloadable instructions for sets going back to 2002. Users may search for instructions by brand, keyword or set number.
LetsBuilditAgain.com, Brickset.com and BrickInstructions.com also offer free Lego instructions online. LetsBuilditAgain.com arranges its instructions by theme and set number. Brickset.com allows users to search by theme or the month the instructions were added to the site. Several instructions for sets made prior to 2010 are listed on the site with a Jan. 1, 2010 post date. BrickInstructions.com's selections include sets going all the way back to 1965. The database is searchable by year or category.