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HP Graphics Language plotter document
File type: Vector graphic file
Files with plo extension can be found as vector plotter files in Hewlett-Packard Graphics Language. Used in plotter devices by HP.
File type category:
Vector graphic file
Date updated: June 23, 2025
The plo file extension is mainly related to vector plotter files in HPGL.
HPGL, sometimes hyphenated as HP-GL, is the primary printer control language used by Hewlett-Packard plotters. The name is an initialism for Hewlett-Packard Graphics Language. It later became a standard for almost all plotters. Hewlett-Packard's printers also usually support HPGL in addition to PCL.
You can view these files in Xnview.
Xnview is able to export *.plo files to other formats.
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