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PLT file format specification

File format .PLT
Type of File Plot
Application AutoCAD
Mime-type Application/octet-stream

What do you understand by PLT file format?

PLT is a file format. It is most commonly associated with the AutoDesk Auto CAD software application. This file format can be printed using a plotter. A plotter draws images using lines instead of printing dots like a normal printer. In simple terms plotting to mean the act of printing and designing with the assistance of software specially developed for creating technical drawings. Sometimes, the PLT file format also called HPGL. It is the standard language for printing line drawings. This file format created by Hewlett-Packard. And it is specially designed for 2D graphical information. This file structure on the basis of Set of commands embedded in the ROM of pen Plotters. PLT format uses two-letter mnemonics as instruction for drawing lines, circles, text, and symbols. HP plotters use PLT as its primary printer control language. Now a days, PLT software use by many softwares. PLT stands for drawing (HPGL). You can create PLT files to send a reprographics company that specializes in plotting large volumes of drawings. To create PLT file, select the Plot to file option in the plot dialog box. A PLT file is similar to PRN file that you can print to a windows systems printer. PLT file contains some additional instruction for the plotter to plot the drawing correctly. It is an important program of graphic design.

PLT Format

PLT file associated with Several software

  • Page Magic Ver. 2.0 Paper Format
  • Organiser Paper Layout Definition (IBM)
  • HP Graphics Language
  • MicroStation Driver Configuration for Plotting (Bentley Systems Incorporated)
  • Clipper Ver. 5 Pre-linked Transfer File
  • Rhea-PV2D PlotView-2D Plot
  • dnaLIMS 3700 Sample Sheet (dnaTools)

How to Open PLT file?

  • STEP1: Select the PLT file, Right click the PLT.
  • STEP2: Now, choose Open with option & select default program.
  • STEP3: If default program option not available, then choose Autodesk AutoCAD 2017, corel presentation x, CorelDRAW Graphics Suite X etc. in the list of program.
  • STEP4: Click Ok.

Note: If computer does not detects correct software's to open PLT file, so you need to install associated software.

3 Reasons of PLT file corruption

  • Due to hard disk error, if any error in hard disk drive of the PC then all the data inside it including .PLT files get corrupted or damaged.
  • Due to virus attack, It is biggest problems for all kinds of computer files. It is a kind of a program which is only created to damage or corrupt the files and folders. It affects on. PLT file is also very serious.
  • Due to human errors, if user forcefully shutdown or turn off our computer systems and at the same meanwhile a .plt file is opened there. So that time PLT file can be easily corrupted.

How to fix PLT file ?

  • Solution 1. If you have a backup of PLT file , so you can be easily restored from that backup.
  • Solution 2. If you have no backup file, so you need to use a third party software to fix the issue of PLT file.


This article aims to help the users to understand the concept of PLT file format. In this article describe the PLT file specification, ways to open PLT file and reasons of PLT file corruption etc. This file format mostly used by CAD applications. PLT file contains 2D graphical information.