Are there tools to design an architecture diagram for a project? I’m looking for a tool that does not eat up my time, rather with drag n drop facility to put everything running on my mind.

try miro.com <- has a personal free price plan too

https://excalidraw.com/ with keyboard shortcuts

I'll recommend my own product: cloudskew.com

I found draw.io useful for all such things and use their google drive integration to save the diagrams on cloud for further sharing.

I prefer kroki.io since it lets me create diagrams with text.

Thanks all.