Visualizing Database Design: From Interactive Canvas to Drizzle, Prisma, and SQL in Real-time

SchemaDraw is a free, client-side web application that allows developers to visually design relational database schemas by drawing tables and connecting columns on an interactive canvas. The tool instantly generates clean, copy-pasteable code for PostgreSQL SQL, Prisma ORM, and Drizzle ORM, and it operates entirely in the browser without requiring server storage or user accounts. Built with React and Vite, it features local auto-save, LZ-compressed URL sharing for collaboration, and developer-friendly tools like protruding connection handles and grid auto-layout.

Every full-stack developer has been there: you are planning a new feature, sketching out database tables, and spending half your time looking up ORM syntax for many-to-many relationships or writing join tables by hand. I wanted a tool where I could visually draw my relational tables, connect the columns, and immediately get clean, copy-pasteable code for the three targets I use most: PostgreSQL SQL, Prisma ORM, and Drizzle ORM. So, I built SchemaDraw https://schemadraw.netlify.app . --- The Architecture: Designing for ₹0 Scale As an indie hacker, I wanted to launch a tool that could support thousands of developers without leaving me with a heavy server bill. To achieve this, SchemaDraw is built as a 100% client-side Single Page Application SPA using React and Vite: 1. Client-side Compilation: The engines that transform your visual nodes into SQL or TypeScript are entirely written in JavaScript, running in the user’s browser. 2. Local Storage Persistence: Your work auto-saves locally so refreshing the tab won't lose your schema. 3. LZ-Compressed URL Sharing: Instead of saving diagrams to a server database, SchemaDraw compresses the entire canvas layout and schema structure into a URL hash component. You can copy the share link and send it to a teammate—the app reads the hash and redraws the exact layout with zero server storage costs. --- Key Features Built for Developers Protruding Target Handles: Most ERD tools place connection dots inside nodes, leading to click collisions. SchemaDraw places handles - outside the borders, lighting up green on valid targets to make 5px drawing links effortless. Interactive Presentation Lock: Toggle read-only mode to safely present or inspect diagrams without making accidental changes. Grid Auto-Layout: Got a messy canvas? One click aligns all your tables into a clean, alphabetical column-row grid. Cohesive Theme Engine: A single click swaps between a clean Light Slate and a cohesive Pitch-Black interface. --- Check it out SchemaDraw is open, free, and requires no accounts or signups. 👉 Try it here: I’d love to hear your thoughts What features, databases, or ORM compilers would make this a permanent part of your bootstrapping toolkit? Let me know in the comments below