All about P21 Files

The P21 file type is primarily associated with JSDAI.

P21	File extension: P21
	File type:	EXPRESS STEP data model

What is a P21 file?

P21 files mostly belong to JSDAI by LKSoft. The P21 file extension is mainly associated with STEP-file, a format that is used to save 3D models and for product data representation/exchange in the industrial automation sector. Such P21 files are Express STEP Data Models and their raw contents are 3D models represented as ISO 10303-21 standard ASCII text defining the physical properties of 3D models. The data in a P21 3D model consists of various sections including a header, file description, schema, data etc. QuickPar, a tool for performing data verification and recovery on Windows operating systems stores PAR recovery volume part 21 in P21 files.

How to open P21 files

You need a suitable software like JSDAI to open a P21 file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your P21 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a P21 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online P21 Text Viewer

Choose your .p21 file to view

or drag and drop it here

Online File Viewer

✈

Read our privacy guarantee in Filext’s terms and privacy policy

Please allow ads on our site

This helps us keep our servers running. Then re-upload your file to view it.

Click here to see how to disable the ad blocker for filext.com

How to extract texts from P21 files or capture a screenshot to PDF, JPG, DOCX, TXT, ...

You can extract texts from P21 file or capture a preview screenshot using our online P21 file viewer:

To do this, click the button "Choose your .p21 file to view" on this page.
After your file is opened in browser,
click "Save as..." in the menu.
Then choose the file format (e.g. JPG, PDF, DOCX, TXT, ...) you want.
Download the converted file.

Programs that open and convert P21 files:

JSDAI by LKSoft
See the previous paragraphs to learn more about the main application. P21 files are often referred to as JSDAI 3d images because this type of file is primarily created or used by this software.
QuickPar (PAR recovery volume part 21) by Peter Clements
QuickPar is a legacy program that's mainly used to create parchives. The program is also used to verify the integrity of such files before attempting to reconstruct/recover damaged files in PAR volumes. QuickPar stores the PAR recovery volume part 21 in a P21 file. This file format is classified as Backup. Related links: Parchive, QuickPar

Technical Data for P21 File Extension

File classification:

3D Image

Related files:

stp, 21, bin, x_t, pt, x_b

Related links:

ISO 10303-21

Mime type:

model/step, application/octet-stream

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: Fluid.Studios.Software.Raid.Toolkit, FileType: Parity archive, AppName: Fluid Studios Software RAID Toolkit

ProgramID: Fluid.Studios.Software.Raid.Toolkit
EXEFile: S:\FSRaidSoftwareRAID\FSRaid.exe %1

ProgramID: FSRaid
EXEFile: C:\Documents and Settings\Supreme Overlord\Desktop\FSRaid.exe %1

ProgramID: PAR_Recovery_Volume
EXEFile: %ProgramFiles%\QuickPar\QuickPar.exe %1

ProgramID: SmartPAR
EXEFile: %ProgramFiles%\smr-usenet\smartpar\SmartPAR.exe %1

ProgramID: Fluid.Studios.Software.Raid.Toolkit
EXEFile: G:\FSRaid.exe %1

ProgramID: PAR_Recovery_Volume
EXEFile: %ProgramFiles%\QuickPar 0.8\QuickPar.exe

Show all 7 listings To Top

a p21 EXPRESS STEP data model is a special file format by LKSoft and should only be edited and saved with the appropriate software.

How to solve problems with P21 files

Associate the P21 file extension with the correct application.
Update your software that should actually open express step data models. Because only the current version supports the latest P21 file format. Search, therefore, e.g. on the LKSoft manufacturer website after an available JSDAI update.
To make sure that your P21 file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .P21 file online - secure, fast, and no downloads needed.