There are several benefits to using a free Visio link:
: You can use this free add-in in Microsoft Excel to automatically generate basic flowcharts and org charts from your data. Quick Access Links
This is widely considered the best free Visio alternative. It is completely free, open-source, and requires no account.
If you do not want to use Microsoft's ecosystem, you can generate a "free Visio link" by converting the file into a universally accessible format.
If you already have Visio and just need free resources, you can find stencils and templates online: Paul Herber's Free Stencils : A collection of free protocol stacks and message symbols compatible with versions from 2013 to 2024. step-by-step guide
Go to the tab and click Hyperlink (or press Ctrl + K ). In the Address box, type a URL or browse for a local file.