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VMMap vs HeapMemView: catalog facts
VMMap	HeapMemView
Free Free download from Microsoft Sysinternals.	Free Freeware from NirSoft, free to use and redistribute unmodified at no charge.
Windows	Windows
Breaks down committed memory and working set by memory type Detailed per-process memory map with filtering	Marks newly allocated blocks between refreshes to spot leaks ASCII or hex preview of each block in the list
Requires Windows 10 or later, or Windows Server 2016 or later Aimed at developers; the output assumes knowledge of Windows memory internals	Official requirements list Windows versions only up to Windows 8 Loading is slow if the small-block filter is removed
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License: Freeware
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.