Duplicate Project add-on allows you to clone existing project and you will get same project with(tasks+checklists).
To duplicate project, you can see Duplicate button in open project view. For more details please see below screen-shot.
Why Use Clone Project Pro?
Quick Duplication: Instantly create a copy of an existing project, including all tasks, timelines, and resources, to jump-start new projects without starting from scratch.
Consistent Setup: Ensure uniformity by cloning project templates, maintaining consistent structures, and applying the same settings across multiple projects.
Time Savings: Reduce setup time and avoid repetitive data entry, allowing you to focus on project execution and strategy rather than administrative tasks.
Flexible Customization: Easily modify cloned projects to suit specific needs, making adjustments to tasks, deadlines, and resources as required.