I built a free file converter with Next.js + FastAPI + FFmpeg — here's how

📰 Dev.to · designvenue05

Learn how to build a free file converter using Next.js, FastAPI, and FFmpeg, and discover the benefits of creating an open-source solution

intermediate Published 26 Mar 2026
Action Steps
  1. Set up a new Next.js project to handle the frontend logic
  2. Create a FastAPI backend to handle file conversion requests
  3. Integrate FFmpeg into the FastAPI backend to perform file conversions
  4. Configure the Next.js frontend to send conversion requests to the FastAPI backend
  5. Test the file converter with various file types and formats
Who Needs to Know This

This project is ideal for a team of developers who want to create a scalable and efficient file conversion tool, with a frontend developer focusing on the Next.js implementation and a backend developer handling the FastAPI and FFmpeg integration

Key Insight

💡 By using Next.js, FastAPI, and FFmpeg, you can create a scalable and efficient file conversion tool that is free and open-source

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📁 Build a free file converter with Next.js, FastAPI, and FFmpeg! 🚀 No more signups or watermarks required 🙌

Key Takeaways

Learn how to build a free file converter using Next.js, FastAPI, and FFmpeg, and discover the benefits of creating an open-source solution

Full Article

I got tired of every "free" file converter requiring signup, adding watermarks, or limiting...
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