What is a PCB file?
A .PCB file is primarily a Printed Circuit Board layout and design file. Engineers use these files to store routing data, schematics, and component placements for electronic circuits. Many different Electronic Design Automation (EDA) applications use the .PCB extension. Common examples include Altium Designer, Siemens PADS, DesignSpark PCB, and legacy software like Protel and P-CAD.
In rare cases, a .PCB file can be a clipboard or backup file created by older versions of Microsoft PowerPoint.
How to open PCB files?
Opening a .PCB file natively is difficult because the extension is shared by many incompatible programs. A layout saved in Siemens PADS will not open directly in Altium Designer without special import procedures. To open the file correctly, you must first know which application created it. If you do not have the right software installed, you will encounter compatibility problems and error messages.
Inspecting with viewer.online
Because the .PCB extension has multiple possible meanings, we recommend using viewer.online/pcb to identify the actual format of your file. viewer.online/pcb can analyze .PCB files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available.
Converting PCB files
If you need to send your design to a manufacturer or share it with a colleague, you usually need a standard format. We recommend file conversion to sensible target formats on convert.guru. You can often convert .PCB designs into standard .Gerber files for production or .PDF files for visual review.
Summary
viewer.online/pcb is useful for identifying, inspecting, and understanding .PCB files without installing software or dealing with compatibility problems. It provides a fast way to check your file contents and find the correct software to handle your circuit board designs.