NextPCB Gerber Viewer (HQDFM) alternatives: 4 other PCB check tools

• The desktop HQDFM app is Windows-only, so macOS and Linux users are limited to the online viewer.
• You want checks aligned to the specific fab you're ordering from (JLCPCB, AdvancedPCB, or Sierra Circuits all check against their own capabilities).
• You want to gate the full KiCad project — schematic ERC, schematic-to-PCB parity, BOM stock — not just the board/manufacturing files.

None of these are knocks on NextPCB Online Gerber Viewer (HQDFM) — you want the deepest free check set — including a native .kicad_pcb upload online, or 1,200+ checks in the free desktop app.

1. 1. JLC DFM by JLCPCB

   DFM and DFA analysis across five modules — traces, solder mask, drilling, silkscreen, and component assembly — using a 30+ point checklist, plus BOM matching against JLCPCB's component library. Free (as of July 2026). Accepts gerber files uploaded as zip/rar, up to 50 MB.

   Best when: You are ordering from JLCPCB and want a free pre-check aligned to their process, including BOM matching against their parts library.

2. 2. FreeDFM by AdvancedPCB (Advanced Circuits)

   File structure and completeness, trace width and spacing, drill and annular ring specifications, layer geometry, solder mask and silkscreen issues — aligned to AdvancedPCB's standard specification capabilities. Free and unlimited (as of July 2026). Accepts gerber files uploaded as a compressed folder.

   Best when: You plan to fab with AdvancedPCB and want a free file check that comes back with a quote and an order discount.

3. 3. Better DFM by Sierra Circuits

   A 40-point checklist across signal layers (conductor width, spacing, annular ring), plane layers, solder mask, silkscreen, and drill, plus netlist comparison against IPC-356 to flag opens and shorts. Free online tool (as of July 2026). Accepts gerber RS-274X or ODB++, submitted as .zip or .tgz; optional IPC-356 netlist for comparison.

   Best when: You have an IPC-356 netlist and want a free gerber-vs-netlist comparison that flags opens and shorts, with a US fab behind it.

4. 4. MakeIRL the paid, KiCad-source option

   Unlike the gerber checkers above, MakeIRL gates the KiCad project itself: ERC on the schematic, DRC on the layout, schematic ↔ PCB parity, BOM line completeness with MPN / package sanity and availability against live distributor stock, gerber / drill / placement export integrity, named heuristic checks (power, reset, programming, connector patterns). Plain-English report with a BLOCKED / REVIEW / READY verdict; every report states explicitly that function is not proven.

   Honest trade-off: it costs $79 one-time per board release (as of July 2026) while NextPCB Online Gerber Viewer (HQDFM) and the other tools here are free, and it only takes KiCad projects. If a free gerber-level check is all you need, use one of the tools above. See the full MakeIRL vs NextPCB Online Gerber Viewer (HQDFM) comparison

Competitor facts checked against NextPCB’s public site as of July 2026. Pricing and capabilities can change — verify before you rely on them.