Can I import Laravel migration files?

Yes! Upload one or more .php migration files and the tool will parse Schema::create, Schema::table, column additions, renames, and drops to generate a complete ER diagram with relationships.

Which SQL dialects are supported for export?

MySQL, PostgreSQL, SQLite, and SQL Server. Each dialect generates proper syntax including data type mappings, auto-increment, quoting style, and engine settings.

Can I design many-to-many relationships with a junction table?

Yes. You can create a junction (pivot) table manually with foreign keys pointing to both related tables, then draw one-to-many relationships from each parent table to the junction table. This is the standard pattern for many-to-many relationships in relational databases.

Does the ER diagram tool support auto-layout?

Yes. Click the Auto Layout button to automatically arrange all tables in a clean, readable layout. You can also manually drag tables to customize positions after auto-layout is applied.

Can I use this tool for PostgreSQL database design?

Absolutely. The designer supports PostgreSQL-specific data types and syntax. When exporting SQL, select PostgreSQL as the target dialect to get proper CREATE TABLE statements with serial types, constraints, and quoting.

ER Diagram Designer - Free Online Database Schema Tool

How to Design Effective Database Schemas

Entity-Relationship (ER) diagrams are essential tools for database design. They visually represent tables, columns, and the relationships between entities in a database system.

Key Concepts

Entities (Tables) — Represent real-world objects like Users, Products, or Orders.
Attributes (Columns) — Properties of entities such as name, email, or price.
Relationships — Connections between entities (one-to-one, one-to-many, many-to-many).
Primary Keys — Unique identifiers for each record in a table.
Foreign Keys — References to primary keys in related tables.

Import & Export

Import SQL files from any database to visualize existing schemas
Import Laravel, Rails, or Django migration files to auto-generate diagrams
Export to MySQL, PostgreSQL, SQLite, or SQL Server with proper syntax
Foreign keys and indexes are included in SQL exports

Best Practices

Normalize your schema to reduce data redundancy
Use meaningful table and column names
Define proper data types for each column
Add indexes for frequently queried columns
Document relationships clearly

The ER Diagram Designer is a free, browser-based tool for creating entity-relationship diagrams without signing up or installing software. Whether you are planning a new database from scratch or documenting an existing one, the visual canvas lets you add tables, define columns with precise data types, and draw relationships between entities using drag-and-drop. Everything runs client-side, so your schema data never leaves your machine.

One of the most powerful features is multi-format import. Paste SQL CREATE TABLE statements and the tool reconstructs the full schema with foreign key relationships. You can also upload Laravel migration files (.php), Rails migrations (.rb), or Django model files (.py) to auto-generate diagrams from your existing codebase. Once your diagram is complete, export production-ready SQL for MySQL, PostgreSQL, SQLite, or SQL Server. Need to format the generated SQL? Use the SQL Formatter to clean it up before committing to your repository.

The ER Diagram Designer pairs well with other developer tools on FindUtils. Convert your schema definitions to TypeScript interfaces with the JSON to TypeScript Converter, validate your API contracts with the GraphQL Schema Validator, or map out the broader system architecture using the Architecture Diagram tool. For state-driven workflows, the State Machine Designer complements database design by modeling application logic visually.

How It Compares

Traditional ER diagram tools like MySQL Workbench, pgAdmin, or dbdiagram.io often require installation, account creation, or paid subscriptions for full functionality. The FindUtils ER Diagram Designer runs entirely in the browser with zero setup. There is no file-size limit on imports, no watermark on exports, and no paywall for features like multi-dialect SQL generation or migration file parsing.

Unlike desktop tools that lock you into a single database vendor, this tool lets you design once and export to four major SQL dialects. The migration import feature is also unique: most online ERD tools cannot parse Laravel, Rails, or Django migration files directly. If you need a quick, private way to visualize or plan a database schema, this free tool handles the job without sending your data to any server.

Frequently Asked Questions

Can I export my ER diagram as SQL?

Yes! Export to MySQL, PostgreSQL, SQLite, or SQL Server. The export includes CREATE TABLE statements with foreign key constraints and indexes.

What relationship types are supported?

The designer supports one-to-one, one-to-many, and many-to-many relationships between tables.

Can I import an existing schema?

You can import JSON schemas, SQL files (CREATE TABLE statements), or migration files from Laravel, Ruby on Rails, and Django.

How do I add foreign key relationships?

Drag from one table's handle to another table's handle to create a relationship. By default it creates a one-to-many (1:N) relationship.

Is my data stored on a server?

No. Everything runs entirely in your browser. Export your schema as JSON or SQL to save your work locally.

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