winnow.md is a browser-based tool that converts your documents into clean, structured markdown optimised for large language models like ChatGPT and Claude. You upload a file. We strip the noise, fix the formatting, rebuild the structure, and hand you back a cleanmd file that LLMs can actually work with. No sign-ups, no servers, no fuss.
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Maker
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Hey Product Hunt! Chris here. I built winnow.md because I kept hitting the same wall when working with AI tools.
Every time I wanted to feed a document into an AI, I'd end up copying and pasting from Word or PDF, losing all the formatting, fighting with messy outputs, or manually tidying things up. It's a small friction, but when you're doing it dozens of times a day as part of AI adoption work, it adds up.
So I built winnow.md. It's a simple, free tool that converts your documents to clean markdown. No sign-up, no nonsense. Upload a file, get markdown back. Job done.
Honestly, I built this for myself. I've been using it for months while building projects in Lovable and it's become part of my daily workflow. I just figured other people are probably dealing with the same annoyance, so why not put it out there.
This is the first tool in a small ecosystem I'm building to make AI adoption easier. I'd love to hear how you'd use it, and what other friction points you run into when working with AI.