What is an HPG file?
The .HPG file extension most commonly represents an HPGL Plot File developed using the Hewlett-Packard Graphics Language. These files store 2D vector graphic instructions. Plotters and printers read these text-based instructions to draw precise lines on paper or cut materials. This format is heavily used in CAD (Computer-Aided Design) software, CNC machining, and apparel pattern making systems like Lectra Modaris.
Because developers use file extensions differently, an .HPG file can occasionally contain other data. It might be a goniophotometer lighting test data file, a reinforcement steel schedule file from Nemetschek Allplan, or even a legacy video game graphic.
How to open HPG files?
Because an .HPG file has multiple possible meanings, it is important to identify its actual format. viewer.online/hpg analyzes .HPG files to identify their exact format and creator software, shows which programs can open the file, and usually previews it.
If you know your file is a standard plot file, you can view it using specialized CAD software such as AutoCAD or ABViewer. Graphic design programs like CorelDRAW can also import these files. Because the files contain plain text instructions, you can also inspect the raw code using a text editor like Notepad++.
File conversion and best practices
Sharing .HPG files can be difficult because most computers do not have CAD software installed. If you need to share a plot drawing with a client or colleague, converting it to a standard document format is the best practice.
You can easily convert your files using convert.guru. We highly recommend converting .HPG files to .PDF for easy document sharing, or to .SVG and .DXF if you need to edit the vector data in other software.
Summary
viewer.online/hpg directly opens and previews .HPG files in the browser, eliminating the need to install software or troubleshoot compatibility issues.