the best tool for you design diagram which there are as below:
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draw.io
draw.io is an open source technology stack for building diagramming applications, and the world’s most widely used browser-based end-user diagramming software.
For me, I recommend you to use this tool because It’s easy export and share to our drive.
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Lucidchart
Lucidchart is the intelligent diagramming application that brings teams together to make better decisions and build the future.
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Excalidraw
Excalidraw is a whiteboard tool that lets you easily sketch .
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tldraw
tldraw is a tiny little drawing app.
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edrawsoft.com
Plan, visualize, and present better results — all in EdrawMax. Get started easily with the Microsoft-like interface, drag and drop feature, and professional template resources. With 280 types of diagram solutions, you and your team can use EdrawMax for every stage of your workflow.
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Miro
Miro Lite is a free-to-use, easy-to-share online whiteboard.
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CloudSkew
CloudSkew is an online diagram & flowchart editor.
