13 Best Free Gerber Viewer For Your Pcb Design

The PCB industry's need for computer-aided design and manufacture is always paramount. However, when designing, there are various PCB NC formats to use. Gerber, Excellon, HPGL, and HPGL-2 are some.  As a result, the need to view these PCB design files. Here, our focus is on the best free Gerber viewer.  Generally, there is various free Gerber Viewer software. Some are view only or Gerber editors as well. They allow you access to the information stored in a Gerber file. Let's review the best free Gerber viewers for your circuit board projects. 

What is the Gerber Viewer?

The official logo of the Gerber format

Source: Wikipedia

The Gerber Viewer is software built to view files in the Gerber, Excellon, and HPGL/HPGL-2 formats. This file viewer is an advanced tool with many features, such as zooming, marking, measuring, etc. Also, it has multilayer viewing that supports mouse wheel panning and zooming. 

The Gerber Viewer also supports PCB designs' 2D/3D vector image formats. Most PCB manufacturers use the Gerber Viewer as a standard image conversion tool. 

What Does a Gerber File Contain?

A Gerber file contains comprehensive information on a PCB design, layer by layer. These layers include the silkscreen layer, pad layer, stencil layer, solder-mask layer, and circuit layer. Often, these Gerber files exist in a zip file format exported by an R&D personnel. Therefore, PCB factories refer to them as a Standard Production File because they are crucial in the production of PCBs for customers. 

A typical Gerber format file

Source: Wikipedia

What does a Gerber Viewer do?

A Gerber Viewer lets a user assess the graphics of a Gerber file as against reading too many numbers. Also, it enables machines from a PCB factory to deploy the Gerber file written for the finished board.

Several functions in Gerber Viewer exist. The common ones include scale, compare, view, print, show drill hole size, calculate copper surface area, etc.

A printed circuit board showing drill areas and conductive traces

Source: Wikipedia

13 Best free Gerber Viewer Software 

While some software allows you to view the Gerber files, some also let you edit the Gerber PCB designs. So, the following list comprises the best free Gerber viewer software for Windows in no particular order.

ViewMate

ViewMate is among the top free GRB file Viewers. It is a simple tool with extensive viewing options. It allows you to select the unit distance between components such as: mm, inch, cm, and mil. Also, it has functions for adding paths/traces like 90 degrees trace, orthogonal trace, circle, elbow, and others to a diagram. Although it does not permit saving the drawing, it allows printing these new additions.

GerbMagic

GerbMagic is another open-source Gerber viewer software available with multiple viewing tools. It has vital features applicable to different Gerber file layers. For example, it has a zoom feature for aligning and moving the selected design. There are also scale and mirror options available here.

GerberLogix

GerberLogix is among the best and simplest GRB file viewer software for Windows. It has layer options like view, select objects, zoom objects, etc. This advanced software allows you to view and manage the layer visibility of Gerber files. 

Like the others, measuring the distance between points, objects, and centers is possible. While it lets you change colors for an enhanced view, you can preview the loaded design before printing. Further, it is possible to export complete or visible areas such as jpg, png, tiff, and BMP.

GerberGrab

GerberGrab enables the essential tools for viewing GRB files. For example, the top and bottom views of a PCB layer are easily visible with this software.

Also, you can search shapes, move, scale, and rotate components. In the PCB industry, it is precious to PCB manufacturers who need to create and check bills of material, build placement lists, or an automated report with details.

ZofzPCB

This software is a unique GRB file viewer. ZofzPcb gives you advanced options for individually peeling layers of a circuit board design. As a result, you obtain details of components like the silver screen, copper, solder mask, etc.

Also, when you scroll with the mouse and press the respective function buttons, there are many other possibilities. For example, Zoom is (F5), Spread (F7), and Peel (F6).

Gerber Viewer

As the name suggests, Gerber Viewer is an open-source viewer for Windows OS. It contains viewing options that allow you to bring in Gerber files for viewing. Gerber Viewer has tools that give you a top and bottom design view. Hiding layers of a design file is also possible. Unlike some other software, Gerber Viewer allows importing Gerber IPC2581 and 724-X files. You need to select and deselect them.

An open window of Gerber Viewer

Source: Wikimedia Commons.

Viewplot

Viewplot is a paid Gerber file editor. However, it lets you view them for free. And it provides a good view of the Gerber file design layers too. It displays each color of layers differently so that when you select a layer, it highlights that layer. There are options for adding text, circles, rectangles, arcs, etc. But, these files remain for viewing purposes. Therefore, they won't be saved.

In addition, you can turn on/off the Grid view anytime. And Diagram dpi is changeable from 300 up to 2400.

GerbEx

GerbEx is another open-source GRB file viewer with simple viewing options. Move and zoom the design board to obtain different views. It also comes loaded with different colors for additional layers of your drawing. So, you can hide/unhide and duplicate layers of your PCB design as you build. 

FlatCam

The FlatCam serves as a Gerber viewer and a Gerber editor simultaneously. It allows you to edit or create a PCB panel from scratch. With a layer-wise view, you can select a component to see its properties before applying them. Further, it allows the measuring of component distances in mm and inches. You can also isolate the board cutout, routing, and non-copper regions to get a better view.

DFM Now

DFM Now gives a detailed view of Gerber files. That is, the top view and bottom view of a drawing are easily visible on this software. All other file layers are also visible. You only need to choose the show/hide option.

Also, you can adjust the slider zoom for easy viewing. Other options allow you to turn the PCB board translucent, making component information visible when clicked. 

LayoutEditor

This software is also a free Gerber editor for viewing selected layers of a PCB design. It has enhanced tools for measuring the distance between objects, moving and rotating, and zooming objects.

There are various editing options for your Gerber files on LayoutEditor. For instance, you can add designs to a PCB drawing, like a path, polygon, cell, box, etc. Also, there are options to copy layers, add, mirror, merge, and delete them. You can manipulate components too.

LayoutEditor shows a dropdown selection of layers

Source: Wikimedia Commons.

GC-Prevue

Besides viewing and printing Gerber files, this software supports CAM tools and views CAD drawings for free. Like the others, it is easy to hide and unhide blank spaces and layers and delete and import them. Also, GC-Prevue lets you rotate and mirror diagrams along the x/y axis. 

Gerbv

Gerbv is not exclusive to Windows alone as it runs on Unix platforms too. However, it is a free native Linux application for viewing Gerber RS-274X files, CSV pick-and-place files, and Excellon drill files.

Gerbv is a utility software rich in features that let you analyze and edit Gerber files like the others. Its numerous tools are handy and user-friendly too.

Gerbv showing a connector design

How Should A User Select the Best Gerber Software?

User-Friendly Interface

A user-friendly interface is essential in Gerber viewing software for product designers, engineers, and electricians. It allows for easy navigation and quick access to necessary tools, enhancing productivity and reducing the learning curve. A well-designed interface can help users efficiently interpret and manipulate Gerber files, leading to more accurate and timely project completions.

Compatibility and File Support

Compatibility with various file formats and versions of Gerber files is crucial for ensuring smooth workflow integration. Engineers and electricians should look for software that supports a wide range of file types to prevent compatibility issues and streamline the design process. This versatility enables seamless collaboration and data exchange between different stages of the project.

Accurate Rendering and Measurement Tools

Accurate rendering of PCB layouts and precise measurement tools are vital features in Gerber viewing software. These tools help engineers and designers verify the correctness of their designs, detect errors, and make necessary adjustments. High accuracy in visualization and measurement ensures that the final product meets all specifications and functions correctly, reducing the risk of costly revisions.

Advanced Analysis and Simulation Capabilities

Advanced analysis and simulation capabilities allow for in-depth examination of PCB designs, enabling users to predict performance and identify potential issues before production. Engineers and electricians should seek software that offers features like signal integrity analysis, thermal analysis, and design rule checks. These capabilities help in optimizing designs for reliability and efficiency, ultimately leading to better-quality products and reduced time-to-market.

Where Can You Find the Best Free Gerber Viewer and Editor

A Gerber Viewer software helps you view PCB component layers separately. As a result, it allows you to edit your design and save it in raster or vector formats for an enhanced view. The best free Gerber Viewers also export a finished design in various readable formats like JPEG, PDF, PNG, SVG, etc.

At this point, you have learned the various free Gerber Viewers for your next electronic project. But if you need additional guidance with a Gerber Viewer, feel free to contact us.