Over the last few months I kept seeing the same problem. Teams want to move from React to Next.js but the migration is repetitive, messy, and full of hidden patterns. So I built a feature rich converter that automates most of the work: reacttonext.com.
The tool handles routing changes, Link conversions, file restructuring, SSR-safe patterns, dynamic imports, and a lot of the tricky edge cases that usually show up late in a migration.
I trained it on 1500 publicly available React codebases and used those patterns to build the rule engine behind it.
The converter completes around 80–90 percent of the migration automatically. After that it generates a README.md containing all the remaining manual review steps. You can follow them yourself or feed the README to an LLM, since the instructions are already written in a way that an LLM can process correctly.
If you want to try it or break it, here you go:
https://reacttonext.com
I am looking for feedback, edge cases, and real-world projects that can push its limits.