Someone Sent Me an .html File

Are you noticing more HTML files being sent to you in Slack or Teams? This is definitely happening across my teams, and I love seeing the rich presentations, documents, and data visualizations. But something was missing!

It makes sense that they keep showing up. HTML is a format everyone understands, and there are libraries for almost anything you want in a document: charts, data visualizations, slides. Models have been trained on the web, so there is a ton of HTML in them, and asking an AI tool for a report or a deck often gives you one. Making a good-looking document has never been easier.

So the file arrives, and it is great. Then I want to give feedback.

A Slack channel where Sam shares q3-launch-plan.html, Ada asks if the team can hit this date, Sam asks which date, and Lee says the one in the middle of the page

A made up example, but it will look familiar

This is where Google Docs is amazing, and I immediately missed it. Giving feedback and having a conversation around the content is so critical to improving things. Instead I had a beautiful page that I could not comment on, so I wrote "the one in the middle" in a thread and hoped it was the spot they meant.

A document with the date July 15, 2026 highlighted and a comment beside it asking if the team can hit this date

What I wanted: the comment sits on the thing it is about

I wanted that for any HTML file. And since these files often come from an AI, I wanted the feedback to flow back to one easily too.

So I had an idea. A JavaScript library that is friendly for AI to use, that adds comments to any HTML document. I called it Pipeup. This blog has it on every page now, so you can select some text here and try it.

If you want the details, they are on the Pipeup site.