Paste two CREATE TABLE dumps. Spot every difference instantly. Get ready-to-run ALTER TABLE scripts in PostgreSQL, MySQL, or SQLite — all in your browser.
No account required. No data leaves your device.
Stop squinting at text diffs. Get a semantic, visual comparison that understands your schema.
Not a line-by-line text comparison. We understand tables, columns, types, defaults, indexes, and constraints.
Generate ALTER TABLE scripts in PostgreSQL, MySQL, or SQLite dialects. Copy, paste, deploy.
All processing happens in your browser. Your schemas never touch our servers. Perfect for sensitive data.
PostgreSQL, MySQL, MariaDB, SQLite support out of the box. More dialects coming based on demand.
Download diffs as Markdown, PDF, or raw SQL. Share a link with your team for async review.
No CLI to learn. No dependencies to install. No Docker image to pull. Open your browser and go.
From schema dumps to migration scripts in three simple steps.
Copy your old schema dump — from pg_dump, mysqldump, or your ORM — and paste it into the left pane.
Paste the new schema into the right pane. SchemaLens parses both instantly, understanding structure — not just text.
See every change highlighted. Generate migration SQL in your dialect. Export, share, or copy into your migration tool.
Handy utilities that run in your browser. No signup required.
Paste CREATE TABLE statements and get instant validation for PostgreSQL, MySQL, SQLite, and SQL Server.
Beautify messy SQL queries with proper indentation, keyword casing, and syntax highlighting.
Format SQLCompare two database schemas and generate migration scripts in seconds. Our flagship tool.
Compare SchemasStart free. Upgrade when you need more power.
For side projects & quick checks
For professional developers
For engineering teams
Join 200+ developers who use SchemaLens to catch schema drift before it hits production.
Try SchemaLens FreeBuilt for the $100 AI Startup Race. Follow our public journey.