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Schema Diff

Paste two CREATE TABLE dumps. Compare. Migrate.

⚑ CLI: npx schemalens-cli diff old.sql new.sql Docs β†’
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Schema A (Old)
Schema B (New)
πŸ’‘ Free tier: visual diff + migration preview for up to 15 tables. Pro: unlimited tables, full migration SQL, Markdown & PDF export, and shareable diff links. New: Try Pro free for 24 hours β€” no email required. Upgrade β†’

Compare database schemas in seconds

Paste two CREATE TABLE dumps, click Compare, and get a visual diff plus ready-to-run migration SQL.

βœ“ PostgreSQL βœ“ MySQL / MariaDB βœ“ SQLite βœ“ SQL Server βœ“ Oracle
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Visual Diff

See exactly what changed β€” added, removed, and modified tables at a glance.

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Migration SQL

Generate ALTER TABLE scripts for PostgreSQL, MySQL, SQLite, SQL Server, and Oracle.

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Breaking Changes

Spot dangerous drops and renames before they break production.

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Privacy-First

Custom parser runs entirely in your browser. Your schemas never touch our servers. How it works

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Join thousands of developers who diff schemas before every deploy.

Browse 6 real-world examples β†’ Β· How it works β†’