Hello ProductHunt!
First post here, and I want to start by introducing you a new open source tool for reading and writing NFC tags from the web.
NFC is currently in Chrome Origin Trials (https://developers.chrome.com/or...) and has still quite limited support.
Anyway, I built this tool around this new NFC API and made it open source.
It is a very minimal is terms of code, and has all the required elements for you to install it as a web app, and run offline.