SQL Designer

What it does

SQL Designer is a free, browser-based entity relationship diagram (ERD) tool that lets you visually design database schemas. You can create tables, define columns with real database types (e.g., INT, VARCHAR, DECIMAL), set constraints (PRIMARY KEY, UNIQUE, NOT NULL), and draw foreign key relationships using crow's foot notation. The tool supports six SQL dialects: MySQL, PostgreSQL, SQLite, Oracle, SQL Server, and Microsoft Access. Once your diagram is ready, you can export a complete CREATE TABLE script in one click, or paste an existing SQL script to visualize it as an editable diagram. SQL Designer also supports importing SQL or JSON schema, and exporting to SQL, JSON, or Laravel migration files. It runs entirely in the browser with no installation required.

Who it is for

SQL Designer is built for developers who need to model relational databases visually before writing migrations. It is ideal for solo developers, small teams, and anyone who wants a quick, no-fuss way to sketch a schema without installing software. The tool is also useful for database administrators and students learning database design. Since it is free and open source, it appeals to cost-conscious users and those who prefer to inspect or contribute to the codebase.

Why it matters

Designing a database schema visually helps catch design flaws early, reduces errors in SQL syntax, and makes it easier to communicate the data model with team members. SQL Designer removes the friction of setup and cost: no download, no login required to start, and unlimited diagrams for free. Its support for multiple SQL dialects means you can use the same tool for different database engines. The open-source nature gives users transparency and the ability to customize or self-host if needed.

Launch signal

SQL Designer is live and actively maintained, with a public website, a blog, and a GitHub repository. The site includes a live demo that requires no signup, and users can create an account to save diagrams. The tool has a community on Discord and email support. The blog features articles comparing SQL Designer with other tools like MySQL Workbench, dbdiagram.io, and Lucidchart, indicating ongoing development and user engagement.

Brand and naming

The name "SQL Designer" is straightforward and descriptive, clearly communicating the tool's purpose: designing SQL database schemas. It is easy to remember and search for, though it may be generic. The brand positions itself as a free, open-source alternative to paid or proprietary ERD tools, emphasizing simplicity and accessibility. The tagline "Free ERD tool · MySQL · PostgreSQL · SQLite · Oracle · SQL Server · MS Access" reinforces its multi-dialect support and zero-cost value proposition.