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 SchemasGenerate beautiful HTML documentation from your CREATE TABLE statements. Export to Markdown.
Generate DocsConvert CSV files to CREATE TABLE and INSERT statements. Auto-detects column types and delimiters.
Convert CSVConvert JSON objects to CREATE TABLE statements. Handles nested objects, arrays, and auto-detects types.
Convert JSONBuild CREATE TABLE statements visually. Add columns, set types, and choose constraints for any dialect.
Generate TableLint your schema for missing primary keys, unindexed foreign keys, and other design issues.
Check HealthFind missing indexes, unindexed foreign keys, and query-specific index gaps. Get instant recommendations.
Analyze IndexesStart free. Upgrade when you need more power.
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