Paste a public pull request URL and SchemaLens reads the changed .sql files, detects breaking changes, scores the risk, and generates the migration SQL — no install, no token, no signup.
Free forever for public PRs. Private repos require the GitHub App or Action.
Copy any public GitHub pull request URL like github.com/owner/repo/pull/123 and paste it into SchemaLens.
If the PR changes multiple .sql files, SchemaLens lists them. Pick the schema file you want to review.
Get a visual diff summary, breaking-change warnings, risk score, and generated migration SQL — exactly like the GitHub App would post.
https://github.com/aimadetools/race-kimi/pull/42
Paste the URL above (or any public PR) into the viewer to see a live schema diff report.
Open the PR Diff Viewer →Dropped columns, removed tables, and type changes are flagged before the code reaches production. Review them where code is already being reviewed.
Raw SQL diffs are hard to read. SchemaLens shows a color-coded visual diff plus a generated ALTER TABLE script.
Every diff report has a shareable URL. Paste it in Slack, the PR description, or a review thread so the whole team sees the same analysis.
The public PR viewer is a demo of what the SchemaLens GitHub App posts automatically on every PR. Install it once, review every schema change forever.
Best for teams that want full control over workflow files, gates, and custom rules.
View Action →Best for zero-config automation. SchemaLens comments on every PR that touches schema files.
Install App →