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Hand tool for prying boards and nails

A crowbar, also called a wrecking bar, pry bar or prybar, pinch bar, or occasionally a prise bar or prisebar, colloquially gooseneck, or pig bar, or in Britain and Australia a jemmy or jimmy (also called jemmy bar), is a lever consisting of a metal bar with a single curved end and flattened points, used to force two objects apart or gain mechanical advantage in lifting; often the curved end has a notch for removing nails. The design can be used as any of the three lever classes. The curved end is usually used as a first class lever, and the flat end as a second class lever. Designs made from thick flat steel bar are often referred to as utility bars.

A common hand tool, the crow bar is typically made of medium carbon steel, possibly hardened on its ends. Commonly crowbars are forged from long steel stock, either hexagonal or sometimes cylindrical. Alternative designs may be forged with a rounded I shaped cross section shaft. Versions using relatively wide flat steel bar are often referred to as "utility" or "flat bars".

The accepted etymology identifies the first component of the word crowbar with the bird name "crow", perhaps due to the crowbar's resemblance to the feet or beak of a crow. The first use of the term is dated back to c. 1400. It was also called simply a crow, or iron crow; William Shakespeare used the latter, as in Romeo and Juliet, Act 5, Scene 2: "Get me an iron crow and bring it straight unto my cell." In Daniel Defoe's 1719 novel Robinson Crusoe, the protagonist lacks a pickaxe so uses a crowbar instead: "As for the pickaxe, I made use of the iron crows, which were proper enough, though heavy."