I've written a nice guide to using Vim/Neovim to batch validate files with W3C's Offline Validators.

Hello,
I've created a nice guide which explains how to use Vim and Neovim to batch
validate HTML, CSS, and SVG files with W3C's Offline Validators.

You can find the page here:
https://vimandgit.com/posts/vim/advanced/neovim-and-vim-w3c-nu-html-validator-batch-validate-html.html

I recently posted the page and thought you might like a heads-up.

Thank you for creating the validators and for making them available to
everyone.

Bidit