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HeapMemView vs VMMap: catalog facts
HeapMemView	VMMap
Best for: Developers inspecting heap allocations of a Windows process while hunting memory leaks	Best for: Developers tracking down memory usage and leaks in Windows applications
Free Freeware from NirSoft, free to use and redistribute unmodified at no charge.	Free Free download from Microsoft Sysinternals.
Windows	Windows
Marks newly allocated blocks between refreshes to spot leaks ASCII or hex preview of each block in the list All 4 strengths for HeapMemView Marks newly allocated blocks between refreshes to spot leaks ASCII or hex preview of each block in the list Exports memory blocks to binary files Portable, with no installation	Breaks down committed memory and working set by memory type Detailed per-process memory map with filtering All 4 strengths for VMMap Breaks down committed memory and working set by memory type Detailed per-process memory map with filtering Saves captures in a native format that can be reopened later Command-line options for scripted captures
Official requirements list Windows versions only up to Windows 8 Loading is slow if the small-block filter is removed	Requires Windows 10 or later, or Windows Server 2016 or later Aimed at developers; the output assumes knowledge of Windows memory internals
Downloadable app	Downloadable app
Not open source	Not open source
License: Freeware	License not stated
No account needed	No account needed
Offline features available	Offline features available
Official website Full listing and sources Sources for HeapMemView nirsoft.net/utils/heap_memory_view.html Catalog checked October 8, 2026	Official website Full listing and sources Sources for VMMap learn.microsoft.com/en-us/sysinternals/downloads/vmmap Catalog checked October 8, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.