Modern alternative PDF browsers are now the most common using embedded PDF's. Thus we can now open PDF and fill fields as seen on the left using Chromium based MS Edge with Powered by Acrobat.)

But using a local or remote HTML file we can ALSO add the field names as seen on the right. This a very clever JS programmed repo by https://stackoverflow.com/users/4695575/dansleboby and can be found on github.