How to open PLANTUML files on your device

If an error occurs when you try to open PLANTUML file on your device, you should do two things – install appropriate software and associate PLANTUML files with this software. If this does not solve the problem, then the cause may be different – you will find more details in this article.

PLANTUML File Extension

  • File type PlantUML
  • File developer
  • File category Misc Files
  • File popularity rating
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How to open PLANTUML file?

There can be various causes of problems that can arise when opening opening .PLANTUML files. Each problem requires a different approach, but most can be solved by following he instructions below.

Step 1. Install a program that supports PLANTUML files

In order to open PLANTUML file an appropriate program that supports this file format must be installed on the system. Below is the list of programs that support files with PLANTUML extension.

Programs that can open PLANTUML files

Windows programs

Download installer for given application and launch it. After the installation has been completed, PLANTUML files should be opened with installed application by default next time you try to open this type of file.



Not all listed applications will be capable of performing all operations on PLANTUML files. Some applications may only be capable of opening such file and viewing its contents while the purpose of others may be converting files to other file formats. Therefore you should check beforehand the capabilities of applications in relation to PLANTUML files.

Step 2. Associate given software with PLANTUML files

A situation can arise where user has an appropriate application supporting PLANTUML files installed on their system, but such application is not associated with this type of files. In order to associate given application with PLANTUML files user should open a file submenu by right-clicking the file icon and selecting "Open with" option. System will display a list of suggested programs that can be used to open PLANTUML files. Select appropriate option and check "Always use selected application to open this kind of files". System will save this information from now on use selected program to open PLANTUML files.

When the above-mentioned solutions fail, other options must be pursued. It is possible that the PLANTUML file in question is corrupted or damage. The most common causes of file damage are:

  1. File with PLANTUML extension is incomplete (for example, file has not been downloaded completely from the internet or not copied properly from source)
  2. File data is corrupted
  3. Damaged or corrupted storage medium on which the PLANTUML file is stored
  4. File icon does not represent the original file but is only a shortcut to the location where the PLANTUML file was saved and then deleted
  5. User account is not privileged to perform operations on PLANTUML files. In that case it is advised to contact the system administrator or an IT expert

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