ParrelSync

Overview

ParrelSync is a MIT-licensed Unity editor extension hosted on GitHub by VeriorPies. It allows developers to open and run multiple Unity editor instances of the same project at the same time, without duplicating the entire project on disk. This makes it practical to test multiplayer or networked game logic locally without needing separate machines or builds. The project is written in C# and has accumulated over 6,000 GitHub stars, indicating broad adoption in the Unity development community. ParrelSync works by creating a clone of the project that references the original assets, so changes made in the primary editor are reflected in the cloned instances. It is particularly useful for indie developers and small teams who need a fast feedback loop when developing multiplayer features.

Highlights

• Open multiple Unity editor instances of the same project simultaneously
• Clone projects without duplicating asset files on disk
• Changes in the primary project are reflected in cloned editors
• MIT license – free for personal and commercial use
• Written in C# and integrates directly into the Unity editor
• Over 6,000 GitHub stars reflecting wide community adoption

Common use cases

• Testing multiplayer or networked game logic locally in Unity
• Rapid iteration on client-server interactions without separate machines
• Indie game development requiring fast local co-op testing
• Debugging networked Unity projects during development