Schema Builder
Design database tables, generate SQL, see the ER diagram.
Schema Builder is a free, browser-based tool on Toolery. Design database tables, generate SQL, see the ER diagram. Everything runs locally on your device, so it's fast and completely private — no uploads, no queues, and no sign-up to try it.
Schema Builder — FAQ
Is Schema Builder free to use?
Yes. Schema Builder is completely free on Toolery — no watermarks and no sign-up required to try it.
Is Schema Builder private — do my files stay on my device?
Yes. Schema Builder runs entirely in your browser. Your files and input are processed on your own device and never uploaded to a server, so nothing is stored, seen, or shared.
How do I use Schema Builder?
Design database tables, generate SQL, see the ER diagram. Open the tool, add your file or input, and get the result instantly — it all happens on your device.
Does Schema Builder send my data anywhere?
No. Schema Builder runs entirely in your browser — your input never leaves the tab, which makes it safe for code, tokens, and other sensitive data.