Stored in your browser only. Never sent to our servers. Get a free key
Explanation
Paste any git diff and get an instant explanation: what changed, what it affects, and what to watch out for. Free, browser-only, BYO Anthropic API key.
Stored in your browser only. Never sent to our servers. Get a free key
Run git diff HEAD~1 or git show HEAD. Paste the output here — or paste any code snippet.
Plain English for a quick summary, Impact for risk, Onboarding for new devs, Checklist for review sign-off.
Copy to your PR comment, share with a teammate, paste into Slack, or add to onboarding docs.
Understand unfamiliar PRs in seconds. Get context on intent before you approve.
New to a repo? Run git log -p on recent commits and paste them in to understand the codebase history fast.
Paste the diff of everything merged while you were out to catch up without reading every line.
Understand a patch or backport before applying it to your codebase.
Run git diff HEAD~1 for the last commit, git diff main..feature-branch for a PR comparison, or git show HEAD for the full latest commit with message. Copy the terminal output and paste it in.
Plain English Summary gives a concise, jargon-free explanation of what changed and why. Impact Analysis identifies what systems are affected and flags risks. Onboarding Guide explains with more context, written for someone new to the codebase. Review Checklist generates things to verify before approving the PR.
Git diffs include 3 lines of surrounding context by default. Claude uses both the changed lines and context to understand the purpose of the change. For complex diffs, run git diff -U10 to include more surrounding context for better explanations.
Nothing is stored by us. The diff goes directly from your browser to Anthropic's API using your own key — no backend, no server, no logging on our end. Your code never touches our infrastructure.
A typical diff (100-300 lines) costs about $0.001-$0.003 with Claude Haiku, or $0.003-$0.01 with Claude Sonnet. You pay Anthropic directly at pay-per-token rates — no subscription, no markup.
Yes. Paste any code — a plain function, a class, a config file. The tool works with raw code as well as git diff format. For raw code, the Plain English Summary and Onboarding Guide modes work best.