Generate PostgreSQL migration SQL

Paste two CREATE TABLE schemas and generate a conservative Postgres migration. The tool runs in your browser, does not use AI, and highlights destructive changes before you copy SQL.

ALTER TABLE users ADD COLUMN display_name text;
ALTER TABLE posts DROP COLUMN published_at;

What it flags

Dropped tables
Dropped columns
Type changes
Required columns
SET NOT NULL
Default changes

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Postgres Migration Diff Generator

Generate PostgreSQL migration SQL

What it flags