Describe what you need and AI will help you design it.
Describe what you need and AI will help you design it.
Entity-Relationship (ER) diagrams are essential tools for database design. They visually represent tables, columns, and the relationships between entities in a database system.
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.
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.
Get Weekly Tools
Join 10,000+ users getting our tool updates.