Unfoldo

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Unfoldo is a web-based sheet metal development software that generates accurate flat patterns for ductwork, piping and plate fabrication in seconds. Choose a shape, enter dimensions, and get a true-size development ready for cutting. It covers more than 190 shapes: square to round transitions, rectangle to rectangle offsets, truncated and oblique cones, lobster back and segmented bends, pipe branches and intersections, breeches, helicals, tank heads and more. Every pattern accounts for sheet thickness (inside, outside or mean dimensions), with seams, laps and bend lines included.