Free tool · No login · No upload
Paste a diff, get an instant AI-change review.
Free, no login, runs in your browser. What changed, risk level, security-sensitive flags, likely missing tests, and a ready-to-paste PR summary.
100% local: your diff is analyzed in your browser and never leaves your machine. No upload, no account.
Try an example:
Fast diff-only review using deterministic heuristics. It sees this patch, not your repo, so treat it as a first pass, not a verdict.
Want the repo-aware version?
This is a diff-only review. For repo-aware analysis (architecture impact, security lens, blast radius, merge readiness), get OpenThunder Desktop or try OpenThunder Cloud.
Turn this into a mastery path -> Repo Mastery
How this tool works
Honest scope: fast, deterministic, and private.
- Everything runs in this page's JavaScript. There is no server call, no upload, no analytics beacon, and no account. Disconnect from the internet and it still works.
- It parses the unified diff, counts what changed per file, and applies deterministic review heuristics: security-sensitive paths and added-line patterns, missing tests, config/dependency/schema breakage surface, and hunk size.
- It is diff-only. It cannot see your architecture, call graph, or history; the repo-aware review with blast radius and merge readiness is what OpenThunder Desktop and Cloud do.