Opening a DLU File

The DLU file type is primarily associated with Skybrary FDR Reader.

DLU	File extension: DLU
	File type:	data file

What is a DLU file?

DLU files mostly belong to Skybrary FDR Reader. DLU files serve two main functions:

Flight Data Recorder files: These files record information from aircraft systems. They store binary data and require software like Skybrary FDR Reader to open and analyze the flight data.

3D Studio Max Plugin files: Some DLU files are built as plugins for Autodesk's 3ds Max. They use an executable (EXE) internal format to add extra functions to the 3D application.

FilExt.com note: Most DLU files encountered are flight data recorder files. Identify the file source to choose the proper program for opening and viewing your file.

How to open a DLU file

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

Online DLU Text Viewer

Choose your .dlu file to analyze

or drag and drop it here

Online File Viewer

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DLU file extension format:

The file format determines how the data is stored in the file. Often, the file format can be deduced from the file extension or the initial bytes (called the signature). Nonetheless, different programs can utilize the same file extension to represent distinct file formats. Double-clicking on the file often results in an error when opening. If there are problems opening a file, you must first determine the file format used. Below you will find our evaluation of the DLU files:

DLU is rarely used as a file extension and is used by a few programs, each with its own file format. The file formats most commonly found in DLU files are:

• 25% of all DLU files start with the magic bytes DLU2, which are always the first bytes of this file format. The contents of these files cannot be read by a human; only a computer program can interpret the data. Most of these files are 150 KB to 150 MB in size. The file type was developed only in the last few years. The keywords info, DLU2 and fdr are typical for these files.
• 20% of all DLU files internally utilize the EXE file format. EXE is the abbreviation for executable and is the standard executable file format on Windows. The format can be identified by the letters "MZ" at the beginning. Executable files can also be used to distribute viruses and other types of malicious software (malware). They consist of unreadable binary data. The average file size is 1 MB with most files being between 46 KB and 3 MB in size. Certain words are almost always found in the files, such as !This program cannot be run in DOS mode. These files are often associated with sini.

All other DLU files (55%) have different formats. You can get all the details of your DLU file by dragging it onto this page or by clicking the button "Choose your .dlu file to analyze" above.