I made a heatmap diff viewer for code reviews
0github.com is a pull request viewer that color-codes every diff line/token by how much human attention it probably needs. Unlike PR-review bots, we try to flag not just by "is it a bug?" but by "is it worth a second look?" (examples: hard-coded secret, weird crypto mode, gnarly logic, ugly code). To try it, replace github.com with 0github.com in any pull-request URL. Under the hood, we split the PR into individual files, and for each file, we ask an LLM to annotate each line with a data structure that we parse into a colored heatmap. Examples:…
I made a heatmap diff viewer for code reviews launched on October 30, 2025 with 265 votes, #101 of 8,178 launches that month and more than 99% of that year's launches.
In plain words
0github.com is a pull request viewer that color-codes diff lines by how much human attention they need. Instead of flagging only potential bugs, it highlights lines worth reviewing for other reasons like hardcoded secrets, unusual cryptography, complex logic, or poor code style. Users access it by replacing "github.com" with "0github.com" in any pull request URL. The tool uses an LLM to annotate each line in a file, then converts the annotations into a color-coded heatmap for easier code review.
written from the facts on this page · September 2026
From the sources
Open source applied AI lab building next-gen devtools
In the maker’s words, at launch
0github.com is a pull request viewer that color-codes every diff line/token by how much human attention it probably needs. Unlike PR-review bots, we try to flag not just by "is it a bug?" but by "is it worth a second look?" (examples: hard-coded secret, weird crypto mode, gnarly logic, ugly code). To try it…
Does a similar job
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Kilo Code ReviewerJan 2026 · kilo.ai · ▲799Automatic AI-powered code reviews the moment you open a PR
ExplainGithub2025 · explaingithub.com · ▲184Turn hours of code reading into minutes of understanding
Git Heat Map – a tool for visualising git repo activity for each file2023 · github.com · ▲173Visualise a git repository by diff activity. Contribute to jmforsythe/Git-Heat-Map development by creating an account on GitHub.
Git Draw allows you to draw pictures directly into your GitHub heat map2016 · github.com · ▲91Allows you to draw in your github heatmap. Contribute to ben174/git-draw development by creating an account on GitHub.
GitReviewed2025 · gitreviewed.com · ▲18Hi HN, I’m Valentin, a developer who’s found code reviews to be a slow process, especially after context switching or juggling different projects and languages. Even reviewing my own code can be tough when I’ve lost the thread or just need a fresh perspective. Over the past few weekends, I built GitReviewed to make PR reviews faster, smarter, and genuinely useful for real teams. What it does: - Reviews any GitHub or GitLab pull/merge request with AI-powered comments, spotting security issues, code patterns, typos, and more - Posts comments as you (not a bot), so feedback fits naturally…
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