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

NextPCB's free online gerber viewer runs 50+ DFM checks in the browser with no login — and accepts native .kicad_pcb files — while the free HQDFM Windows desktop app runs 1,200+ DFM/DFA checks. That's the deepest free check set in this niche. Still, there are real reasons to reach for something else.

## Why look beyond NextPCB Online Gerber Viewer (HQDFM)?

- 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.

## The alternatives

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. **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. **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. **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.

Competitor facts checked against [NextPCB’s public site](https://www.nextpcb.com/free-online-gerber-viewer.html) as of July 2026. Pricing and capabilities can change — verify before you rely on them.

Updated July 2026