Codiff, a local diff review tool
Nowadays I review a lot of code locally that was written by llms. I used to review my own code using git + delta. It started to feel limiting with the amount of code written by llms. When looking at a large diff on Friday I pointed an llm at diffs.com and trees.software and told it to build an app. It only took 16 minutes, is extremely fast for large diffs, beautiful and minimal. Today I polished it up and added all the features that I need. It has file filters, search, an llm walkthrough mode, and review comments that you can paste back into your llm. I will be using Codiff a lot, and can…
In plain words
Codiff is a local diff review tool designed for developers who need to examine large code changes, particularly those generated by language models. It offers file filtering, search functionality, an LLM walkthrough mode for guided reviews, and the ability to add review comments that can be exported back to AI tools. The tool prioritizes speed and minimal design while handling substantial diffs more effectively than traditional git-based review workflows.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Nowadays I review a lot of code locally that was written by llms. I used to review my own code using git + delta. It started to feel limiting with the amount of code written by llms. When looking at a large diff on Friday I pointed an llm at diffs.com and trees.software and told it to build an app. It only took 16 minutes, is extremely fast for large diffs, beautiful and minimal. Today I polished it up and added all the features that I need. It has file filters, search, an llm walkthrough mode, and review comments that you can paste back into your llm. I will be using Codiff a lot, and can finally review the large diff from Friday that led me to build this If you like it, fork it!
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