Opening PUML Files

The PUML file type is primarily associated with PlantUML.

PUML	File extension: PUML
	File type:	text file

What is a PUML file?

PUML files mostly belong to PlantUML. A PUML file is a text-based file that holds a script for creating UML diagrams. It uses a simple language to describe diagram elements such as classes, interfaces, and their relationships. The instructions in the file are processed by PlantUML to generate visual diagrams (for example, in PNG or SVG format).

The file is plain text and can be edited with any text editor.

The script follows a clear syntax to define diagram structure.

It is primarily used by developers to design and document software architectures.

For rendering the diagrams, you can use the PlantUML tool or an online renderer available at PlantUML website.

FilExt.com note: This file format supports version control systems well, as it is fully text-based.

How can I open a PUML file?

You need a suitable software like PlantUML to open a PUML 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 PUML file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a PUML file directly in the browser:. Just drag the file onto this browser window and drop it.

Online PUML Text Viewer

Choose your .puml file to view

or drag and drop it here

Online File Viewer

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

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

Just click the "Choose your .puml file to view" button 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 PUML files:

PlantUML
See the previous paragraphs to learn more about the main application. PUML files are often referred to as PlantUML developers because this type of file is primarily created or used by this software.
PlantUML
A .PUML file stores a UML (Unified Modeling Language) diagram in a human-readable, text-based format. It uses the PlantUML language, which allows users to create various UML diagrams, including class diagrams, sequence diagrams, use case diagrams, and more, using a simple and intuitive syntax. The .PUML file contains the PlantUML code that describes the diagram's elements and their relationships. This code is then processed by a PlantUML renderer to generate an image of the diagram in various formats like PNG, SVG, or LaTeX. The text-based nature of .PUML files makes them ideal for version control systems, as changes can be easily tracked and compared. They are also highly portable and can be edited with any text editor. This file format is classified as Developer Files.

PUML format details:

If you can determine the file format, the associated program can also be determined. The file format can be deduced from the file extension and the signature. However, different programs can use the same file extension, and file extensions can be assigned incorrectly. Exact knowledge of the format is therefore important in order to solve problems occurring in files. Our evaluation of the PUML files is as follows:

The PUML extension is quite commonly used. The file itself is primarily used by a single program. But the following two file formats are common:

85% of all PUML files start with the bytes @start crucial for this file format. These files are text files, so they contain words and text. The average file size is 2 KB with most files being between 770 bytes and 10 KB in size. The file type was created recently. The keywords @startuml, skinparam and title are typical for these files. These files are attributed to diagram, class, architecture, sequence, diagrama, activity, case and flow.
8% of all PUML files have the same signature @start. The contents of these files are easily readable with a text editor. PUML files can be up to 5 KB in size, but are often around 360 bytes - 2 KB. Several words can almost always be found in the files, e.g. @startuml and actor. Such files are related to component, secuencia, anexa, casos and cycle.

All other PUML files (7%) have no uniform format, frequently e.g. UTF-8. The category is diagramme, schema, clases, context, plantuml or model. You can get all the details of your PUML file by dragging it onto this page or by clicking the button "Choose your .puml file to view" above.

Technical Data for PUML File Extension

File classification:

Developer

Related files:

uml, wsd, pml, palm, plantuml, asta, txt, svg, png

a puml text file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with PUML files

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