Gerber PCB Viewer with Peer Review: Faster Board Inspection Before Fabrication
FabFlow now includes a browser-based Gerber PCB viewer designed for PCB inspection, layer review, schematic reference, measurement, sharing, and peer review comments. The goal is simple: help teams catch board issues before a PCB fabrication job moves forward.
For electronics teams, the Gerber package is the manufacturing source of truth. But review is often scattered across file downloads, screenshots, emails, chat messages, and separate CAD tools. FabFlow brings that review into the portal so customers, engineers, and manufacturers can inspect the same board and discuss the same points.
What is a Gerber PCB viewer?
A Gerber PCB viewer opens the fabrication files exported from PCB design tools. These files describe copper layers, solder mask, silkscreen, solder paste, drill data, and board outline information used by PCB manufacturers.
An online Gerber viewer helps teams inspect:
- Top and bottom copper layers.
- Solder mask and silkscreen alignment.
- Drill holes and plated through holes.
- Board outline and mechanical constraints.
- Inner layers for multi-layer PCBs.
- Label placement, component footprints, and manufacturing artwork.
FabFlow's viewer is built for this practical review step, not just passive file display.
Why peer review matters before PCB fabrication
PCB errors are expensive after fabrication. A missed board outline, incorrect drill file, confusing silkscreen label, or footprint mismatch can delay assembly and force a board respin.
Peer review reduces that risk by letting multiple reviewers inspect the board before production. In FabFlow, a reviewer can open the shared board, inspect layers, take measurements, compare the schematic reference, and add comments directly at the relevant location.
That matters because PCB feedback should be tied to the exact feature being discussed. "Check this connector clearance" is much more useful when the note appears on the connector, not buried in an email thread.
Key capabilities in FabFlow's Gerber PCB viewer
The viewer includes workflow features built for real review:
- Upload a Gerber ZIP or individual layer files.
- Render top, bottom, inner, mechanical, outline, and drill data.
- Toggle individual layers from the layer controls.
- Pan and zoom inside the board preview.
- Measure between points in millimeters or mils.
- Add comments at specific board locations.
- Mark comments resolved or unresolved.
- Hide or show comments and measurements during inspection.
- Upload a schematic reference and view it beside the PCB.
- Share the board using a public review link or restricted email-based access.
- Support signed-out public reviewers with a name or anonymous comment option.
These capabilities make the viewer useful for both engineering review and manufacturing intake.
Schematic side-by-side review
Gerber files show fabrication artwork, but reviewers often need schematic context to understand intent. FabFlow supports a schematic upload alongside the PCB so reviewers can compare board artwork with the circuit reference.
This helps during checks such as:
- Confirming connector pinout orientation.
- Reviewing sensor and peripheral placement.
- Comparing net intent against visible routing.
- Checking labels and silkscreen references.
- Understanding why a component is placed in a specific region.
Keeping schematic and Gerber review together reduces context switching and makes feedback easier to follow.
Measurement tools for PCB inspection
The measure tool supports precise inspection workflows. Reviewers can click a start point, preview the dotted measurement line, and click an endpoint to keep the measurement on the board. Measurements can be viewed in millimeters or mils.
This is useful for:
- Board dimensions.
- Connector spacing.
- Mounting hole placement.
- Clearance checks.
- Component-to-edge distance.
- Antenna keepout and mechanical reference areas.
Small details matter in PCB fabrication. A quick online measurement tool helps reviewers validate those details without leaving the portal.
Sharing options for low-friction review
FabFlow supports two review patterns:
- Anyone with link: Best for quick review. Anyone can view the Gerber board, and signed-out reviewers can add comments using their name or anonymously.
- Email-restricted sharing: Best for private review. The invited user must sign in with the matching email before accessing the board.
This keeps the barrier low for fast review while still supporting controlled access when the board should stay private.
Why this improves PCB manufacturing workflows
An online Gerber PCB viewer with peer review improves the workflow because it keeps inspection, discussion, and manufacturing context together.
For customers, it means:
- Easier review before sending a PCB to fabrication.
- Less need to install specialized software.
- Clearer feedback from teammates or manufacturers.
- Better confidence before submitting a board.
For manufacturers, it means:
- Faster intake checks.
- Fewer ambiguous review notes.
- A shared record of comments and resolved issues.
- Better communication before quoting or production.
For engineering teams, it means:
- A lightweight review step before release.
- Better collaboration between hardware, firmware, and manufacturing stakeholders.
- Fewer board respins caused by preventable artwork issues.
SEO-relevant use cases
FabFlow's Gerber PCB viewer is built around common electronics manufacturing searches:
- Online Gerber viewer for PCB files.
- Gerber file inspection before fabrication.
- PCB peer review with comments.
- PCB layer viewer for copper, mask, silkscreen, and drill files.
- PCB board outline and drill review.
- Browser-based PCB fabrication review.
- Schematic and PCB review side by side.
The value is not just viewing Gerber files. The value is making review faster and more collaborative.
The practical takeaway
PCB fabrication quality starts before the order is placed. A Gerber viewer with measurement, comments, schematic reference, and shareable review links helps teams find problems earlier.
FabFlow's Gerber PCB viewer gives customers and manufacturers a shared place to inspect the board, discuss issues, resolve comments, and move forward with more confidence.
Related FabFlow tools
- Try the Gerber PCB Viewer: /labs/gerber-viewer
- Create a PCB fabrication job: /create-job
- Find manufacturers: /find-manufacturers