All about UMDX Files

The UMDX file type is primarily associated with Lucidchart.

UMDX	File extension: UMDX
	File type:	zipped XML file

What is a UMDX file?

UMDX files mostly belong to Lucidchart. UMDX files are a specialized internal file format that store unified Modeling Diagram data. They use a ZIP container to bundle XML content which details diagram elements, connectors, and layout information.
This format is primarily used by Lucidchart to create and edit diagrams. The XML inside defines the structure and properties of the modeled data.
In some cases, UMDX files are also recognized as Edraw Mind Map files, linking them to EdrawMax applications.
Key points as outlined by FilExt.com include:

The file is a compressed (ZIP) archive encapsulating XML data.

It is mainly used for modeling diagrams.

You can inspect its contents by renaming it to .zip and extracting the file.

It is optimized for diagramming tools, especially Lucidchart.

FilExt.com tip: For further details, visit the Lucidchart webpage.

How to open UMDX files

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

Online UMDX Text Viewer

Choose your .umdx file to analyze

or drag and drop it here

Online File Viewer

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Programs that open and convert UMDX files:

Lucidchart
See the previous paragraphs to learn more about the main application. UMDX files are often referred to as Lucidchart data files because this type of file is primarily created or used by this software.
Pigjar by Stephen Rigden
Pigjar is a home accounting software the development of which was abandoned. The program code is available on Github and the repository includes files with the UMDX extension.

UMDX file format:

If you can determine the file format, the associated program can also be determined. A file format is determined by the file extension and signature, so JPEG images have the extension .jpg and the first bytes in the file are ÿØÿ. 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 analysis of the UMDX files produces the following result:

The UMDX file extension is not found very often and mainly uses a special format. The following file formats are most commonly found in UMDX files:

99% of all UMDX files use ZIP compression, so several files are compressed and saved in one UMDX file. A UMDX file can contain up to 29 files (mostly 3 - 8). File names are e.g. _general.ini, 1_Sheet1.ini, 1_Sheet1.txt and printinfo.plist. A little tip: If you rename the file extension to .zip and then double-click, you will see the included files and images. The average file size is 6 KB with most files being between 3 KB and 65 KB in size. Certain words are almost always found in the files, such as _general.ini. Such files are related to flow, diagram, chart, flowchart, structure, flujo and jobs.

All other UMDX files (1%) have different formats. Just click the "Choose your .umdx file to analyze" button on this page to find out what your UMDX file is.

Technical Data for UMDX File Extension

File classification:

Data

Related files:

uml, vsdx, drawio, mmap, umd, zip, anom, afpk, cia, xml

a umdx zipped XML file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with UMDX files

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