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Free tool · Carrier board v4.1
Fabricating the v4.1 node is five pages of settings on a PCB house's site, and a wrong toggle on any of them costs you a build. Work through it here: set a page, upload what you see, and get it read back against the board's real spec. Free, no sign-in. If you'd rather read it as a static guide, the JLCPCB walkthrough covers the same ground.
Paste a screenshot with Ctrl+V (Cmd+V on Mac), or use the Attach button for files. Print to PDF with Ctrl+P → Save as PDF for multi-page views. Nothing you upload is stored.