Yes, PerfView is 100% free. It is released under the MIT license, which means you can use it for any purpose - personal projects, commercial development, enterprise production servers - without paying anything or registering an account. There is no free tier with limited features or a paid premium version. Every capability including CPU sampling, GC heap analysis, flame graphs, and trace differencing is available at no cost. Competing tools like JetBrains dotTrace start at $299/year, and Visual Studio's profiling tools require a Professional or Enterprise subscription. PerfView's MIT license a

Updating PerfView is as simple as downloading the new PerfView.exe and replacing the old one. There is no auto-update mechanism. The current version is v3.1.30 (February 2026). Releases happen roughly every 2-4 months. Steps: check github.com/microsoft/perfview/releases for new versions, download the new PerfView.exe, close any running instance, replace the old file, and delete the PerfView subfolder to ensure clean extraction of updated dependencies. Subscribe to the GitHub repository's Releases only notifications to get email alerts for new versions.

PerfView supports a full command-line interface for collecting and analyzing traces without the GUI. Common commands: PerfView.exe collect /AcceptEULA /NoGui /MaxCollectSec:30 for a 30-second trace, PerfView.exe run /AcceptEULA MyApp.exe for profiling a specific application, and PerfView.exe GCCollectOnly /AcceptEULA /NoGui for lightweight GC-focused traces. The /AcceptEULA flag suppresses the license dialog, /NoGui prevents the window from appearing, and /Zip:true compresses output for easier transfer. Run PerfView.exe -help to see all available options. This is especially useful for automate