I'm Darren, a designer turned AI prototyper and indie hacker based in Tokyo, Japan. I love building, prototyping and shipping full-stack SaaS tools powered by AI. I try to merge design intuition with code, strategy, and generative AI.
As AI coding tools like Cursor and Windsurf became my daily drivers, I was constantly creating BRDs, PRDs, and sprint plans in markdown to feed these AI Coding Agents.
The problem? I needed a better way to read and evaluate these files to decide whether they were good ideas worth implementing or vibe coding as side projects.
So I built MarkdownToDoc - a completely free tool to transform any markdown into beautiful, readable documents. The entire app was vibe coded using a systematic AI development approach, proving that great tools can be built quickly and efficiently — this took 24 hours to complete!
Fun fact: This was inspired by my work on Pico Pitch, which generates markdown files for product planning. I needed a way to make those outputs more readable for my own evaluation process, and now you can use it too!
Simply paste your markdown, choose your format, and get a beautiful document instantly. No sign-ups, no subscriptions, no data stored on our servers.
Real-time markdown editor with live preview
Export to PDF, HTML, and styled documents
Save directly to Google Docs, Notion, Dropbox, and GitHub
100% free with no registration required
Your documents stay in your browser - complete privacy
Works perfectly on desktop and mobile devices
UI available in 18 languages
I believe in building tools that actually solve real problems. MarkdownToDoc focuses on privacy, performance, and user experience. No tracking, no data collection, just a simple tool that works.
I have a bunch of other private repos covering various tools and solutions: translation tools, restaurant menu systems, digital signage applications, and more. If you're interested in exploring any of these projects or discussing potential collaborations, feel free to DM me!
Got feedback, suggestions, or just want to chat? I'd love to hear from you! Hit me up on any of these platforms:
Don't be a stranger - I actually read and respond to messages!