You can easily draw up a simple org chart in Microsoft Word or Powerpoint but that's mostly a futile exercise. It depends on why you're designing a diagram in the first place.
Do You Need an Organizational Chart Maker? It is also helpful to show how the organization is evolving and identify potential productivity pitfalls. It is especially helpful for new employees who can refer to the organizational chart as they get familiar with your company. It is a diagram that, if done well, answers the following questions: A company org chart is a visual representation of your company structure.