Opening a DUPX File

The DUPX file type is primarily associated with WhatsApp.

DUPX	File extension: DUPX
	File type:	duplicate marker

What is a DUPX file?

DUPX files mostly belong to WhatsApp. .dupX files are files flagged as duplicates of media content.
They are not new media types but rather duplicates that contain standard formats like JPG (image), PNG (image), or MP4 (video).
Key details provided by FilExt.com include:

Media Duplication: These files are often created by services such as WhatsApp to store duplicate images or videos.

Purpose: They help in managing file copies by keeping a marked version that signals a duplicate, sometimes used in backup or cache processes.

How to Open: You can usually rename the extension from .dupX to the native format (like .jpg, .png, or .mp4) to open it with your standard viewer.

FilExt.com note: This design is practical for file management and duplicate detection, letting users identify and sort extra copies of media.

How to open a DUPX file

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

Online DUPX Text Viewer

Choose your .dupx file to analyze

or drag and drop it here

Online File Viewer

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DUPX file format:

The file format, which is the arrangement and type of data in a file, determines which program can open the file. Often, the file format can be deduced from the file extension or the initial bytes (called the signature). Frequently, however, one file extension is used by different programs for different file formats, and one file format for different file extensions. Knowledge is power - this also applies when dealing with unknown or faulty files. Below is our analysis of the DUPX files:

The DUPX file extension is used very often and predominantly uses a uniform format. But the following two file formats are common:

• 70% of all DUPX files are using the well-known JPG file format to store the data. JPEG is the standard image format for lossy and compressed image data. They consist of unreadable binary data. Most of these files are 26 KB to 1 MB in size. The file type is relatively new. The keywords JFIF are typical for these files. The following filename is common: IMG_20180601.jpg.dupx. These files can be linked to jpeg, screenshot, snapchat, arshana, received, image and sugan.
• 20% of all DUPX files store the data in the MP4 file format. MP4 is a multimedia container format used to store video and audio and allows streaming over the Internet. These files contain neither text nor words, but only data. The files are on average 15 MB in size and range from 1 MB to 120 MB. Certain words are almost always found in the files, such as lmvhd, \tkhd, moov, ftypmp42, trak and ftypisom. The following filename is common: VID_20180601.3gp.dupx or VID-20180601-WA0006.mp4.dupx. Such files are related to movie, video, videos, woman, videoshow and man.

All other DUPX files (10%) have different formats, frequently e.g. PNG. Files like these are sometimes linked to pics. If you want to find out which format your DUPX file belongs to, just click on the button "Choose your .dupx file to analyze".