MariaDB Schema Diff.
Generate migrations.
Zero setup.

AUTO_INCREMENT Handling

Correctly detects AUTO_INCREMENT additions, removals, and starting value changes across schema versions.

CHARACTER SET & COLLATE

Preserves CHARACTER SET utf8mb4 and COLLATE clauses in column definitions so your migrations stay exact.

Constraints & Indexes

Primary keys, unique constraints, foreign keys, CHECK constraints, and FULLTEXT indexes — all compared semantically, not by raw text.

Backtick Identifiers

Handles backtick-quoted identifiers (`order`) and reserved-word table names exactly like MariaDB does.

Virtual & Persistent Columns

Recognizes VIRTUAL and PERSISTENT generated columns. Warns when computed columns change in your schema.

Privacy First

Your schema never leaves the browser. Compare production MariaDB schemas safely without uploading sensitive table structures to a third-party server.

Column type change

ALTER TABLE `users`
  MODIFY COLUMN `bio` VARCHAR(500);

Add a new column

ALTER TABLE `orders`
  ADD COLUMN `shipped_at` DATETIME;

Add a foreign key

ALTER TABLE `comments`
  ADD CONSTRAINT `fk_comments_post`
  FOREIGN KEY (`post_id`) REFERENCES `posts`(`id`);

Set a default value

ALTER TABLE `tasks`
  ALTER COLUMN `status` SET DEFAULT 'pending';