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Database Schema Diff

Compare two database schemas (DDL dumps) and generate a structural diff plus a dependency-ordered ALTER TABLE migration script. Detects added/dropped/changed tables, columns, types, constraints, and indexes; flags data-loss operations. Multi-dialect (ANSI/MySQL/PostgreSQL/SQLite/T-SQL). 100% client-side.

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Compare two database schemas (DDL dumps) and generate a structural diff plus a dependency-ordered ALTER TABLE migration script. Detects added/dropped/changed tables, columns, types, constraints, and indexes; flags data-loss operations. Multi-dialect (ANSI/MySQL/PostgreSQL/SQLite/T-SQL). 100% client-side. Everything runs locally in your browser — your data never leaves your device.

How to use

  1. Enter your input in the tool above.
  2. Adjust any options to your preference.
  3. Use the Copy or Download buttons to save the result.
  4. Everything happens locally — your data never leaves your browser.
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