Is Dual Monitor Tools Safe to Download?
Short answer: yes. Dual Monitor Tools is a long-running open-source project — here’s how you can verify that for yourself instead of taking our word for it.
Four ways to verify DMT is safe
1. It’s open source (GPLv2)
The complete C# source code is public. Anyone can inspect exactly what DMT does — there is no hidden behavior, no telemetry, and no bundled adware. The project is developed by Gerald Evans and hosted on SourceForge since 2009.
2. Downloads come from the official project
Our download buttons point directly to the official SourceForge project files — the same binaries the developer publishes. We don’t repackage or modify them.
3. Verify the checksums yourself
Every release on our download page lists full MD5 and SHA-256 hashes. After downloading, run Get-FileHash in PowerShell and compare. If the strings match, the file is byte-identical to the official release.
4. No admin rights required
The portable ZIP runs as a standard user. DMT only requests elevation when you want it to manage windows owned by administrator-level programs.
What about the SmartScreen warning?
Understanding the SmartScreen prompt
When you first run the installer, Windows may warn that the app is “not commonly downloaded.” This happens because DMT isn’t signed with a commercial code-signing certificate — a cost few free open-source projects can justify. The warning is about the signature, not a malware verdict. Clicking “More info” → “Run anyway” is the standard path for unsigned open-source tools.
Frequently Asked Questions
Why does Windows SmartScreen warn me when I install DMT?
SmartScreen flags software that isn’t digitally signed with an expensive code-signing certificate. As a free open-source project, DMT isn’t signed that way. The warning is about the signature, not about malware — you can verify the files yourself with the SHA-256 checksums on our download page.
Does Dual Monitor Tools collect my data or show ads?
No. DMT has no telemetry, no ads, and no bundled offers. It runs offline from your system tray and never phones home.
Is it safe to grant DMT administrator rights?
DMT asks for admin rights only so it can manage windows belonging to elevated programs (like Task Manager). The portable version runs fine without admin rights for most features.
Ready to try Dual Monitor Tools?
Free, open-source, and portable. Get version 2.13 now.
Download DMT v2.13 (Free)