Developer schema tool

DDL Compare

Diff two schemas. Review operations. Generate ALTER scripts for MySQL and PostgreSQL.

Paste Local DDL (desired) and Origin DDL (current). This tool does not connect to a live database.

MySQL ComparePostgreSQL CompareGetting started

01

Schema diff

Compare CREATE and ALTER DDL for MySQL and PostgreSQL. Local is the new/desired schema; Origin is the old/current schema.

02

Two modes

Leave Origin empty to consolidate Local statements into CREATE TABLE scripts. Fill both sides to list structural differences.

03

Selective SQL

Pick which operations to keep, then generate the change SQL. Copy it into your own migration or client — nothing is applied for you.

How it works

  1. Paste dialect, version, and DDL. Load a sample on first run.
  2. Select the operations you want from the diff list.
  3. Generate SQL, then optionally append it to Origin DDL.