Free tool · No login · No upload
Paste a diff. See what needs a closer look.
Free, no login, and processed in your browser. This first pass uses text patterns to suggest review questions. It cannot inspect your full repository, run tests, or establish merge readiness.
This tool processes the diff in this browser. No account, content upload, or AI request.
No draft is saved by this tool. Clear removes the input and results from this page; it does not clear your clipboard. Copying a report includes file paths. Review it before sharing.
Try an example:
Diff-only triage, not a merge verdict. See an executed example and check your full change locally.
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 -> Skills Tech Talk
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. After this page has loaded, the analysis works without a network connection.
- 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.