SuperDoc

SuperDoc is a word processor that runs in a browser. Real DOCX files, rendered and edited on a web page, and it’s an open-source library you can drop into your own app and extend however you want. That last part is the entire reason it matters.

I found it while building the proposal generation system for Sheffler & Company. Their proposals get assembled programmatically, with all the scope and pricing and boilerplate injected automatically, but a human still has to touch the thing before it goes to a client. Without something like SuperDoc that means download the document, open Word, make your edits, upload it back. With it, they just write directly in the browser and it’s still a real Word document underneath. No round trip, no version confusion, no “which copy is the current one.”

It’s been a fantastic result. I’m on the open-source version, not the commercial license, and it has held up to everything we’ve thrown at it. My agents have extended it a good bit too, which you can actually do because the source is right there.

If you’re building anything that has to generate or edit Word documents, look at this before you talk yourself into building your own.