The most popular open-source alternative; it looks and feels very similar to the MS Project classic interface.
Microsoft offers a one-month free trial of Project Online Professional or Project Online Premium.
If your trial expires and you still need project management tools, consider these free, open-source alternatives that can open and edit .mpp (MS Project) files:
Usually, "Project Plan 3" or "Project Plan 5" offers the desktop client download.
If you need project management software permanently without a subscription fee, consider these free, open-source alternatives that can often open .mpp (MS Project) files:
These files often contain malware, ransomware, or keyloggers.
⚠️ to avoid automatic billing.
The most reliable way to download MS Project for free is through the official Microsoft 30-day trial. This gives you full access to the cloud-based versions of the software.
These are not full MS Project downloads, but they solve the "I received a .mpp file and can't open it" problem.
Pirated versions do not receive security patches, leaving your project data vulnerable.