PR Description Generator

Auto-Generate Pull Request Descriptions from Git Diff

Q: How do I auto-generate a pull request description from a git diff?

Paste your git diff output into AI Diff Summarizer, select 'PR Description' mode, add your Anthropic API key, and click Summarize. Claude reads every changed file and generates a structured description with a title, a bulleted list of changes, and a test checklist — ready to paste into GitHub or GitLab.

Stop spending 10 minutes writing PR descriptions. Paste your git diff, choose PR Description mode, and get a GitHub-ready title, change summary, and test checklist in under 5 seconds.

📋 Generate PR Description Free →

How it works

Run `git diff` in your terminal

Use git diff main...HEAD or git diff HEAD~1 to get the diff for your branch or last commit. Copy the output.

Paste the diff & select "PR Description" mode

Paste your diff into the tool and click the PR Description tab. Enter your Anthropic API key once — it stays in your browser only.

Copy the structured output into GitHub

You get a PR title, a bulleted list of changes grouped by concern, and a test checklist. Paste it directly into the GitHub PR description field.

Frequently asked questions

How do I auto-generate a pull request description from a git diff?

Paste your git diff output into AI Diff Summarizer, select PR Description mode, add your Anthropic API key, and click Summarize. Claude reads every changed file and generates a structured description with a title, a bulleted list of changes, and a test checklist — ready to paste into GitHub or GitLab.

What does a good pull request description include?

A good PR description has: (1) a short, imperative title describing what changed and why, (2) a bulleted list of the significant changes grouped by concern, (3) a testing checklist so reviewers know what was validated, and optionally (4) a "breaking changes" section if the PR modifies a public API or database schema.

Is my source code sent to a server when I generate a PR description?

Your diff is sent directly from your browser to Anthropic's API using the key you provide. It never passes through any third-party server. The tool runs entirely in your browser — there is no backend, no database, and nothing is stored.

Can I use this for large pull requests with many changed files?

Yes. The tool passes your entire diff to Claude, which has a large context window (up to 200,000 tokens). For very large diffs, Claude 3.5 Sonnet handles them well. If you hit a context limit, trim the diff to the most significant hunks before pasting.