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Database Schema Diff

Compare two PostgreSQL/SQLite DDL sources or SQLite files locally. Review table, column, index, and foreign-key changes and generate a non-executing migration draft.

DDL and SQLite files are parsed locally. The tool never requests credentials or executes migrations.

Before

After

About Database Schema Diff

Compare PostgreSQL or SQLite structures and review migration risk. Compare two PostgreSQL/SQLite DDL sources or SQLite files locally. Review table, column, index, and foreign-key changes and generate a non-executing migration draft. The core workflow is designed to run in your current browser.

Key capabilities

  • Keep raw types while comparing PostgreSQL and SQLite semantics
  • Classify additions, modifications, and removals by risk
  • Treat renames as suggestions until explicitly confirmed
  • Generate review-only migration drafts that are never executed

Useful for

  • Review structural changes and data-loss risks before a migration
  • Compare development, staging, and production schemas
  • Export a stable schema-diff report with a release

Frequently asked questions

Is Database Schema Diff free to use online?

Yes. Database Schema Diff opens in a modern browser and does not require desktop software installation.

What is Database Schema Diff useful for?

Common use cases include Review structural changes and data-loss risks before a migration; Compare development, staging, and production schemas.

Is my input or file uploaded?

The core processing workflow is designed to run locally in the browser. Key capabilities include Keep raw types while comparing PostgreSQL and SQLite semantics, Classify additions, modifications, and removals by risk, Treat renames as suggestions until explicitly confirmed; account, comments, and anonymous analytics may still create normal site requests.

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