ER Diagram - Design database schemas online — free, no signup needed
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Simple, fast ER diagram editor — design databases visually without the bloat. Free guest mode, DBML import/export, version history. No signup required.
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Maker
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Hey Product Hunt 👋
I'm the maker of ER Diagram.
This started from a small annoyance: I just wanted to sketch a database schema — five tables, a couple of foreign keys — and every tool I tried made me create an account and confirm my email before I could draw a single box. For a thirty-second sketch.
So I built the thing I wanted: you land on the page and start drawing immediately. No signup, no modal, nothing in the way. Guest diagrams are saved locally in your browser, so a reload won't wipe your work. You only need an account if you want cloud sync or sharing.
A few things it does:
• Import & export SQL DDL and DBML — it round-trips, so you're never locked in
• Drag-to-connect foreign keys, auto-layout, PNG/SVG export
• Prebuilt schema templates (e-commerce, blog, SaaS, hospital, and more)
• Works in 10 languages
On the tech side: it's SvelteKit (Svelte 5) with a Canvas renderer (LeaferJS) instead of DOM nodes, so it stays smooth even with a lot of tables.
It's free to use. I'd genuinely love your feedback — especially if you throw a messy real-world schema at it and the layout does something silly. I'll be around all day answering questions 🙏
→ https://erdiagram.dev/?utm_sourc...
@erdiagram The no-signup friction removal is a refreshing take—you're right that most tools front-load auth for something that should be instant. The local browser persistence for guests is a smart move since people often sketch before committing to anything. How are you thinking about the monetization beyond cloud sync, or is that the primary lever you're exploring right now.
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@saulfleischman Cloud sync isn't really the monetization hook — it's more of a baseline convenience so people can pick up their work across devices without thinking about it. The stuff I find more interesting to build around is grouping, annotations, and version history. Those are the features that start mattering once a schema gets real — when you're collaborating, iterating on designs, or need to track how things evolved. Different design contexts need different levels of structure, and that's where I see the value landing.
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@erdiagram The no-signup friction removal is a refreshing take—you're right that most tools front-load auth for something that should be instant. The local browser persistence for guests is a smart move since people often sketch before committing to anything. How are you thinking about the monetization beyond cloud sync, or is that the primary lever you're exploring right now.
@saulfleischman Cloud sync isn't really the monetization hook — it's more of a baseline convenience so people can pick up their work across devices without thinking about it. The stuff I find more interesting to build around is grouping, annotations, and version history. Those are the features that start mattering once a schema gets real — when you're collaborating, iterating on designs, or need to track how things evolved. Different design contexts need different levels of structure, and that's where I see the value landing.