Opening an HDMP File

The HDMP file type is primarily associated with Windows Vista.

HDMP	File extension: HDMP
	File type:	heap dump

What is an HDMP file?

HDMP files mostly belong to Windows Vista by Microsoft. A HDMP file is an error dump or a memory/heap dump generated by Windows XP or Windows Vista operating system when an application or the system crashes. HDMP format is similar to MDMP and DMP files generated after a system crashes. However, unlike DMP dumps, HDMP dumps contain uncompressed errors and trace logs. Because HDMP dumps are uncompressed, such dumps are not sent to Microsoft's error report servers.

How to open HDMP files

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

Online HDMP Text Viewer

Choose your .hdmp file to analyze

or drag and drop it here

Online File Viewer

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Unable to Open a .HDMP File? Quick Solutions:

Because .HDMP files can originate from different programs, they aren't universally openable.

1. Identify the Source: If it appeared after a System crash, it's likely a Windows Vista (or later) heap dump. If sent by a developer, it may be for debugging.
2. Check the Header: Open the file in a hex viewer to inspect the first bytes:
   • MDMP or PAGEDUMP indicates a Microsoft Windows crash dump.
   • Readable text suggests a custom error log.
3. Use the Original Software: You usually need the original debugging tools; try Microsoft Visual Studio or WinDbg, or ask the sender.
4. Use this Webpage: Drag and drop the file into our viewer to detect its format, extract metadata, and preview readable text.

HDMP format details:

If you can determine the file format, the associated program can also be determined. The initial characters of a file are called signature, sometimes also referred to as "magic bytes". The signature can be used to infer the file format. If the file extension does not match the file format, double-clicking on the file will cause an error upon opening. If there are problems opening a file, you must first determine the file format used. Our analysis of the HDMP files produces the following result:

HDMP is seldom used as a file extension and is mainly used by one program with a specific format. The following file formats are most commonly found in HDMP files:

• 95% of all HDMP files use the same file format, which can be identified by the letters "MDMP" at the beginning. The content consists of illegible binary data, which can only be read and interpreted by the associated programs. A typical file size is 65 MB. The file type is relatively new. The keywords MDMP are typical for these files. The file name memory.hdmp is characteristic of these files. Such files are related to werb.

The remaining 5% of all HDMP files are files with no common format. If you want to find out which format your HDMP file belongs to, just click on the button "Choose your .hdmp file to analyze".