However, several good quality free tools are available. One of them is Canva Flowchart Maker, a browser-based tool available as part of the Canva design suite. Canva Flowchart Maker: Plans and ...

It also provides you some Process diagram templates that you can use to draw a flowchart in Excel. Just add a process SmartArt graphics and edit the steps for the process to create your own flowchart.