What is the Online SQL Designer tool?

The Online SQL Designer is a web-based visual database modeling tool that allows you to create, edit, and visualize database schemas without writing SQL code manually. You can design tables, define columns with data types, establish relationships (foreign keys), and export the final design as executable SQL scripts compatible with MySQL, PostgreSQL, SQLite, and other databases.

Can I use this tool on mobile devices?

While the tool is accessible on mobile browsers, it is primarily optimized for desktop use due to the complex drag-and-drop interface and detailed visual workspace. For the best experience, we recommend using a desktop or laptop computer with a large screen. Mobile users can view existing designs but may find creating new schemas challenging.

What database systems are supported for SQL export?

The designer supports exporting to multiple database systems including MySQL, MariaDB, PostgreSQL, SQLite, Oracle, SQL Server, and standard ANSI SQL. Each export generates syntactically correct CREATE TABLE statements with appropriate data types, primary keys, foreign keys, indexes, and constraints specific to the selected database system.

Is my database design data secure?

Yes! The SQL Designer operates entirely in your browser using client-side JavaScript. Your database schemas are not uploaded to any server unless you explicitly choose to share them. All data remains local to your device. For additional security, avoid including sensitive information like actual data values or passwords in table names or comments.

Can I import existing database schemas?

Currently, the tool focuses on visual design and export functionality. Direct import of existing database schemas is not supported. However, you can manually recreate your existing database structure using the visual interface, or use the SQL export feature to generate scripts that can be executed on your database server to create the designed schema.

Online SQL Database Design Tool – Free & Easy

💡 Tip: Click the fullscreen button below to open the designer in a larger window for better editing experience. The tool works best on desktop browsers.

What Is SQL Designer?

SQL Designer is a free online tool that lets you visually create and manage database schemas directly in your browser. Instead of writing complex CREATE TABLE statements from scratch, you can drag and drop tables, define fields, set data types, and establish relationships between tables. This visual approach makes it easier to plan your database structure before writing any code, whether you are a developer, data analyst, or student learning SQL.

The tool is particularly useful for rapid prototyping and collaborative database design. You can export your schema as a tidy SQL script ready for use in MySQL, PostgreSQL, SQLite, or other relational databases. Because it runs entirely online, there is no software to install or configure—just open the page at ToolFK and start designing. It also supports saving your work locally or sharing the schema with team members for review. For those seeking an online SQL database design tool that is free and easy, SQL Designer provides a practical, no‑frills solution that gets the job done.

Key Features

Visual Table Creation: Add tables with a single click, then define column names, data types, and default values through an intuitive interface.
Relationship Mapping: Connect tables using foreign keys and visualize one‑to‑many or many‑to‑many relationships with clear lines and cardinality markers.
Instant SQL Generation: Automatically produce a complete SQL script from your design, compatible with multiple database engines (MySQL, PostgreSQL, SQLite).
Drag‑and‑Drop Interface: Rearrange tables, resize fields, and organize your schema without any coding.
Export & Save Options: Download your schema as an image (PNG), as a JSON backup, or as an SQL file for later use.
No Registration Required: Start designing immediately without signing up or sharing personal data.

How to design a database schema with SQL Designer

Open the SQL Designer tool at tools/online-designer on the ToolFK website.
Click the Add Table button (or press the shortcut key) to create your first table. Give it a meaningful name (e.g., users).
Add columns by clicking inside the table. For each column, set a name, choose a data type (e.g., INT, VARCHAR, DATE), and define constraints like PRIMARY KEY, NOT NULL, or AUTO_INCREMENT.
To create a relationship, click the Relationship icon, then click the source column (e.g., order.user_id) and the target column (e.g., users.id). The tool will draw a line and you can set the type of relationship.
Repeat steps 2–4 until your schema is complete. Use the Arrange button to auto‑layout the tables neatly.
Click Export and choose SQL to generate the schema script. Copy or download it and run it in your database client.

Best Use Cases

Rapid Prototyping: Quickly test different table structures and relationships before committing to code changes.
Learning SQL Fundamentals: Students and beginners can see how tables, keys, and constraints interact visually.
Collaborative Design Reviews: Share the JSON export with teammates so they can import and tweak the schema without writing SQL.
Documentation: Export a PNG image of your schema to include in project documentation or presentations.
Database Migration Planning: Visualize how an existing database maps to a new structure by rebuilding the schema in the tool.

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Frequently Asked Questions

Can I import an existing SQL file into SQL Designer?

Yes, the tool supports importing SQL CREATE TABLE statements. Paste your SQL in the import dialog, and the tool will parse the tables, columns, and keys to rebuild the visual schema. This is a great way to visualize and refactor an existing database.

Is my data safe if I use SQL Designer online?

SQL Designer runs entirely in your browser. No data is sent to any server unless you choose to export or save a file. Your schema remains private and is only stored locally (or optionally in your browser’s local storage) until you clear it.

What database engines does the generated SQL support?

The exported SQL is compatible with MySQL, PostgreSQL, SQLite, and MariaDB out of the box. You can also tweak the export settings to match specific syntax variants (e.g., using SERIAL for PostgreSQL). For advanced needs, you can manually edit the generated script.

Can I undo changes if I make a mistake?

Yes, the tool provides a full undo/redo history. Use Ctrl+Z (or Cmd+Z on Mac) to step backwards through all your table additions, column edits, and relationship changes. This makes experimentation safe.

How many tables can I create with the free version?

There is no artificial limit. You can create as many tables and relationships as your browser can handle. The tool is completely free and does not require any subscription or payment.

Can I share my schema with someone who doesn’t have the tool open?

Yes. Export your schema as a JSON file and send it to a colleague. They can open SQL Designer and import that JSON to see your exact design. Alternatively, export a PNG image for quick visual sharing.

Last updated: July 1, 2026