Free SQL→ER diagram tool, runs in the browser, nothing uploaded

A tiny browser tool for turning plain database setup text into a visual map has somehow delivered big main-character energy. The pitch is simple: paste in your table setup, get an interactive relationship diagram instantly, drag things around, export it as an image, and—crucially for the privacy crowd—nothing leaves your device. No sign-up, no paywall, no sneaky upload. In a community that is deeply tired of being asked to hand over data just to do basic work, that last part got a loud virtual standing ovation.

The creator, robhati, came in with extremely humble vibes—basically, “I built this because every other option annoyed me.” That mood clearly hit home. One commenter flat-out said, “I was looking for it, thanks! Great work!” which is the internet equivalent of confetti. But because this is the internet, peace lasted about six seconds before someone spotted that the GitHub link dumped people onto GitHub’s front page instead of the actual project. Instant tiny-drama: less scandal, more sitcom pratfall.

And then came the most delightfully niche fight of all: line discourse. One user politely asked for straight lines and neat right angles because they don’t like the current curvy connectors. Yes, the hottest design debate here is basically Team Squiggle vs. Team Sharp Corners. It’s the kind of nerdy chaos people adore—low stakes, weirdly passionate, and oddly relatable. In short: a useful free tool arrived, the privacy-conscious crowd cheered, one link tripped on the red carpet, and the comments immediately started redesigning the furniture.