What is an HDMP File?

How to Open, Edit, & Convert HDMP Files

HDMP Files
HDMP Files.

A file with the HDMP file extension is a Windows Heap Dump file used for storing uncompressed error files generated, or "dumped," when a program crashes in Windows.

Compressed dump files are stored in the MDMP (Windows Minidump) format and are used by Windows to send the crash reports to Microsoft.

Note: HDMI is a common search term that has a similar spelling as HDMP but it has nothing to do with this format or any file format.

HDMI stands for High-Definition Multimedia Interface.

How To Open an HDMP File

HDMP files that are Windows Heap Dump files can be opened using Microsoft Visual Studio through its File > Open > File... menu. Recent versions of Visual Studio can open HDMP, MDMP, and DMP (Windows Memory Dump) files this way.

Note: If you're using a version of Visual Studio that doesn't seem to let you open an .HDMP file, just rename the file to .DMP and then try again. The program should support that file type. However, if you get an error about "not enough storage," it's likely that the dump file is too large for Visual Studio to load into memory.

Windows Heap Dump files can be analyzed with the Windows Debugger tool. You may also find use in the free BlueScreenView program for scanning and reading minidump files.

Note: You can safely remove HDMP and MDMP files from your computer if you don't want to investigate the cause for the errors or if they're taking up too much disk space.

However, if the problem persists, it's likely that more of these dump files will be created. As with all computer problems, it's always best to resolve them before they get out of hand.

If you find that an application on your PC does try to open the HDMP file but it's the wrong application or if you would rather have another installed program open HDMP files, see my How To Change the Default Program for a Specific File Extension guide for making that change in Windows.

How To Convert an HDMP File

I'm not aware of any way to convert an HDMP or MDMP file to any other format.

More Information on Dump Files

The Windows Registry location that holds error reporting information is in the HKEY_LOCAL_MACHINE hive, under the \SOFTWARE\Microsoft\Windows\Windows Error Reporting\ key.

The folder that programs typically hold dump files in may be called dumps or reports, and is typically found in the program's installation directory.

If you need help finding an .HDMP, .MDMP, or .DMP file on your computer, one easy way to search for it is with the free tool Everything.

If at any time while a process is running, you'd like to create a DMP file, you can do so through Windows Task Manager. Just right-click the process you want the dump created for, and then choose Create dump file.

More Help With HDMP Files

See Get More Help for information about contacting me on social networks or via email, posting on tech support forums, and more. Let me know what kinds of problems you're having with opening or using the HDMP file and I'll see what I can do to help.