Free AI Part Generator for Schematic Symbols & PCB Footprints

An AI part generator creates the two library assets every PCB design needs for a new component: the schematic symbol and the PCB footprint. Instead of redrawing pins and pads by hand from a datasheet, you give the generator a part number, datasheet PDF, URL, or image, and the AI extracts the pinout, package, and land pattern to build both files for you, already linked together.

Making custom parts is one of the slowest jobs in electronics design. A 48-pin microcontroller symbol plus its QFN footprint can take an hour in a library editor; the generator turns that into a couple of minutes of review. It is free to start and works with the tools you already have: KiCad, EAGLE, Altium, and Allegro.

Drop in a datasheet PDF and the AI reads the mechanical drawing and recommended land pattern, then builds the PCB footprint from the documented pad dimensions, pitch, courtyard, and pin 1 marker. Footprints follow IPC-7351B land-pattern conventions, so pad-to-pad spacing, toe and heel fillets, and courtyard clearances match what your fab and assembly house expect. You get the full pad table back to check every dimension against the datasheet before you place the part. It works on QFN, QFP, SOIC, SOT, BGA, and through-hole packages, and on scanned PDFs where you can only screenshot the outline drawing. No measuring the datasheet by hand.

Every new component needs two library assets, and the generator builds both, already linked. The schematic symbol is the logical view: a box with named, numbered pins and their electrical types that you wire up on the schematic. The PCB footprint is the physical view: the copper pads, courtyard, and silkscreen the part actually solders to on the board. The link between them is what saves you: pin 1 on the symbol maps to pad 1 on the footprint, so the netlist carries cleanly into layout. Most tools make you draw one or the other. ProtoFlow returns the pair, with the pin-to-pad mapping done for you.

Want to browse parts that are already drawn? Explore the schematic symbol library and the PCB footprint library, or generate a new part here when the one you need is not in any library.

One generated part exports to every major EDA tool, with no plugin to install. The schematic symbol and PCB footprint stay linked across every format, so the part behaves the same whichever tool your team uses. If you run ProtoFlow on the desktop, the Open in ProtoFlow button deep-links the exact part into the component picker so you can place it without a download round-trip.

Four ways in, one part out. Paste a manufacturer part number like STM32F103C8T6 and the AI finds and reads the datasheet for you, including parts from DigiKey, Mouser, Arrow, and Farnell. Paste a datasheet URL and it pulls the document directly. Upload a datasheet PDF and it parses the pinout, package, and land pattern. Or drop in an image, a photo or screenshot of the pinout page, when that is all you have. No other generator accepts all four inputs, and you can refine the result with the AI instead of editing pads by hand.

Library databases like SnapEDA and Ultra Librarian search for parts someone already drew, so they stall on novel or custom packages and gate downloads behind an account. Indie AI tools like Footprint AI and Librizer generate from a datasheet but charge per part and cover fewer formats. ProtoFlow generates the linked symbol and footprint from scratch, even for a part in no library, exports to all four major EDA tools, and includes free monthly generations with nothing to install. You get the pin and pad tables to verify against the datasheet and an AI refinement loop to fix anything before it touches a board.