Crocodile - Better code review for GitHub
Hi HN! I've been working on a code review app for GitHub called Crocodile for about a year. I used to work at Microsoft where we used a tool called CodeFlow for reviewing code and I missed it after I left. I know many other ex-Microsoft engineers feel the same. Here are some of the distinguishing features of Crocodile that are inspired by CodeFlow: * Comments float above the code instead of being inline. Long discussions that are displayed inline make it really hard to review the code. * Comment on any text selection in the file, even a single character. * Comments don't get lost when code…
In plain words
Crocodile is a code review tool for GitHub that displays comments in floating panels above code rather than inline, making it easier to review without long discussion threads obscuring the code. Reviewers can comment on any text selection, including individual characters, and comments persist even when code changes or is rebased. The tool was inspired by Microsoft's CodeFlow and built for developers who want a streamlined review experience.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hi HN! I've been working on a code review app for GitHub called Crocodile for about a year. I used to work at Microsoft where we used a tool called CodeFlow for reviewing code and I missed it after I left. I know many other ex-Microsoft engineers feel the same. Here are some of the distinguishing features of Crocodile that are inspired by CodeFlow: * Comments float above the code instead of being inline. Long discussions that are displayed inline make it really hard to review the code. * Comment on any text selection in the file, even a single character. * Comments don't get lost when code changes. I hate it when comments become "outdated" because I rebase or the line is edited. I also implemented lots of features that I wish CodeFlow had which you can read more about on the blog. [1] For those curious about the tech stack: it's mostly written in Go with Alpine.js, HTMX, and Tailwind CSS for the frontend. For storage I use PostgreSQL, S3 compatible object storage, and Redis for caching. I use Pulumi for infrastructure provisioning and Kubernetes deployments. Everything is hosted on DigitalOcean. Feedback is welcome! [1] https://www.crocodile.dev/blog/why-crocodile
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