Free tools

The same engine that builds boards in the studio runs at tools.koppar.ai on files you already have. No account, no install. Upload a file and go.

Tool	Input	What you get
Netlist → Schematic	`.net`	A `.kicad_sch` project: real library symbols, motif-aware placement, a multipage hierarchy for larger designs, and SVG previews.
Netlist → Placed & Routed PCB	`.net`	A full `.kicad_pcb`: board size derived from the parts, placement, routing, and a KiCad DRC report. 1, 2, 4, 6 or 8 copper layers.
Auto-router	`.kicad_pcb`	The unconnected nets of a placed board routed. Existing copper is preserved by default, zones are refilled, and the result comes back DRC-checked.
DRC check	`.kicad_pcb`	KiCad’s verdict: errors by type, unconnected items, and the gate errors that matter for fabrication.
Board preview	`.kicad_pcb`	SVG renders: a composite view plus one image per copper layer.
Gerber / IPC-2581 / ODB++ export	`.kicad_pcb`	Gerbers with Excellon drill files, IPC-2581 XML, or an ODB++ archive.
Netlist stats & ERC	`.net`	Component, net and pin counts by reference prefix, plus a heuristic electrical-rules check. Instant.

Limits

Fair-use limits apply: a few heavy PCB jobs per day per visitor.
Routing can take up to 15 minutes. Heavy jobs run in a queue; the page shows your position. Leave the tab open if you like.
Uploads are deleted after 24 hours.

The tools take KiCad files. A netlist exported from another EDA package in KiCad’s .net format works too.