Paste your schema. Get your diagram. That's it. No signup, no upload, no tracking.
Database design is complex. Communicating structure is harder. Existing tools require signup, subscriptions, or cloud uploads that expose your schema. This tool removes all friction. Drop in your CREATE TABLE statements, get a clean entity relationship diagram. Modify, regenerate, export. Share via PNG, SVG, or HTML. All in your browser. All completely free.
All processing happens in your browser. Your SQL never leaves your machine. No servers, no logs, no trackers.
MySQL, PostgreSQL, SQLite, SQL Server, MariaDB. Paste your statements and we handle the parsing.
Download as PNG, SVG, or HTML. Share diagrams with teams instantly. No account required.
Runs in any modern browser. Works offline. Load once, use forever.
"Finally, a tool that respects both my privacy and my time. No accounts, no AI upsell, no vendor lock-in. Just instant, accurate ER diagrams from raw SQL."
Open the tool in your browser. Paste SQL. See your entity relationships instantly.
Open SQL to ER ToolFree. Open source. Forever.
No plans to change this. No freemium tier. No upsell. The tool is completely free and will remain that way.
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This is not a purchase and there is no card field. It puts your address, this product, and whatever you write below in front of a person, and you get a written answer about what finishing it, or handing it over for you to run yourself, would actually take.