Catch breaking schema changes in every PR with the free SchemaLens GitHub Action.

SQL Schema to Data Contract Generator

Turn your SQL CREATE TABLE statements into a documented data contract with quality rules, freshness SLAs, and constraint metadata. Everything stays in your browser.

Dataset / product name

Owner

Contract version

Freshness SLA

Tags (comma separated)

Paste CREATE TABLE / CREATE INDEX / ALTER TABLE statements

Keep data contracts in sync with your CI/CD pipeline

SchemaLens diffs schemas in every pull request and flags breaking changes before they break dbt models, ETL jobs, or downstream consumers. Add the free GitHub Action or see the data engineering guide.

Analyze dependencies · Check compatibility · Schema change checklist

Generated Data Contract

Keep data contracts in sync with your CI/CD pipeline