Online PCB viewers, ranked · #5 of 6
Ucamco Reference Gerber Viewer
Verdict: The reference check for Gerber and drill files before they go to fab, from the company behind the Gerber format; no schematic, 3D or BOM.
Ucamco's Reference Gerber Viewer is a free online viewer for fabrication data, from the company that develops the Gerber format.
It does one job: show you exactly what your Gerber and drill files say, layer by layer, including X2 attributes, with measurement and a syntax checker. It is the last check before an order, not a way to review a design.
Who it suits
Engineers checking fabrication output (Gerber, Excellon, IPC) before ordering boards.
What it costs
Free (freeware, per Ucamco).
Best for
- The final check of Gerber and drill files before ordering
- Diagnosing a Gerber file another viewer renders oddly
Not for
- Design review: there is no schematic or BOM
- Sharing a board with someone
Strengths
- Made by Ucamco, the developer of the Gerber format
- Gerber X1 and X2, Excellon, XNC, NC and IPC files, multi-layer
- Shows all X2 attributes and object information
- Measures distances and clearances; includes a formal syntax checker
Limits
- Manufacturing files only: no schematic, no 3D, no BOM
- No sharing or saved boards
- Shows what the fab will build, not the design intent behind it
On the six criteria
| Criterion | Ucamco Reference Gerber Viewer |
|---|---|
| File formats | PartlyGerber X1 and X2, Excellon, XNC, NC and IPC: manufacturing files only. |
| Layers | YesMulti-layer view with measurement and object information. |
| 3D | NoNo 3D view. |
| BOM | NoNo BOM. |
| Privacy | Not statedServed over https; check Ucamco's terms for how long uploads are kept. |
| Sharing | NoNo sharing links. |
Sources
Checked against these pages on 10 November 2026. Look there for anything that may have changed since.