Unfolder is a cloud-based sheet metal unfolding service that turns 3D STEP files into production-ready DXF flat patterns in seconds. No desktop software required — just upload your file and download the results. Upload any STEP file, whether it's a single part or a complex assembly. Unfolder automatically detects bends, holes, and cutouts, applies proper bend allowance and K-factor calculations, and exports a flat pattern ready for laser cutting or CNC punching. For assemblies, individual sheet metal parts are extracted and processed automatically. Alongside the DXF flat patterns, you can download the unfolded parts as STEP files and a BOM spreadsheet — everything you need to hand off to production. A free tier is available for getting started. Paid plans unlock higher volume, batch processing, and API access for automated workflows.