SQL to ER diagram tool
Ranked 3 of 11 diagram tools by recommenders
Browser-based tool that turns a pasted SQL schema into an interactive ER diagram, with nothing uploaded or stored. Some dispute whether SQL can yield a true ER diagram.
Browser-based tool that turns a pasted SQL schema into an interactive ER diagram, with nothing uploaded or stored. Some dispute whether SQL can yield a true ER diagram.
28 people gave an opinion
- recommend it
- 27
- criticize it
- 1
- approval share
- 96%
Recommended in 2 of 13 months
- November 2025: not recommended
- December 2025: not recommended
- January 2026: not recommended
- February 2026: not recommended
- March 2026: not recommended
- April 2026: not recommended
- May 2026: not recommended
- June 2026: recommended
- July 2026: not recommended
- August 2026: recommended
- September 2026: not recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 27 people recommend itNeeds 10 or more, met.
- 27 recommenders for every criticNeeds 2 to 1 or better, met.
- Recommended in 2 of 13 monthsNeeds 4 or more, not met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Clean, polished, well-crafted interface
“what is here now is so well crafted that it feels uncomfortable asking for features”
Comment from 14 Jun 2026 in “Free SQL→ER diagram tool, runs in the browser, nothing uploaded” “It’s responsive, clean and “onboarding” experience without signup walls is great.”
Comment from 14 Jun 2026 in “Free SQL→ER diagram tool, runs in the browser, nothing uploaded” “just got reminded of that project after looking at this great implementation”
Comment from 14 Jun 2026 in “Free SQL→ER diagram tool, runs in the browser, nothing uploaded” - Comment from 14 Jun 2026 in “Free SQL→ER diagram tool, runs in the browser, nothing uploaded”
- Comment from 14 Jun 2026 in “Free SQL→ER diagram tool, runs in the browser, nothing uploaded”
Useful for visualizing database schemas
“that's the kind of boring tool I bookmark and come back to on every migration”
Comment from 31 Aug 2026 in “Show HN: Drop a SQL schema, get an interactive ER diagram” “I was really in need of something like this to visualise my schemas”
Comment from 14 Jun 2026 in “Free SQL→ER diagram tool, runs in the browser, nothing uploaded” “This is cool! People actually need sthng like this.”
Comment from 14 Jun 2026 in “Free SQL→ER diagram tool, runs in the browser, nothing uploaded” - Comment from 14 Jun 2026 in “Free SQL→ER diagram tool, runs in the browser, nothing uploaded”
No signup, uploads, or storage
“It’s responsive, clean and “onboarding” experience without signup walls is great.”
Comment from 14 Jun 2026 in “Free SQL→ER diagram tool, runs in the browser, nothing uploaded” “this seems like a worthwhile tradeoff for not having to store anything”
Comment from 14 Jun 2026 in “Free SQL→ER diagram tool, runs in the browser, nothing uploaded” “No backend, no accounts, no data leaving your machine.”
Comment from 14 Jun 2026 in “Free SQL→ER diagram tool, runs in the browser, nothing uploaded” Solves an old problem well
“Such an old problem solved very elegantly. Congrats.”
Comment from 14 Jun 2026 in “Free SQL→ER diagram tool, runs in the browser, nothing uploaded” “Author(s) did the homework.”
Comment from 14 Jun 2026 in “Free SQL→ER diagram tool, runs in the browser, nothing uploaded”
Other diagram tools people recommend
The four most recommended other diagram tools, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| Mermaid | 93 | 46 | 67% | 12 | — | Approved |
| Reladraw | 28 | 7 | 80% | 1 | — | — |
| SQL to ER diagram toolThis page | 27 | 1 | 96% | 2 | — | — |
| D2 diagram language | 21 | 6 | 78% | 6 | — | Approved |
| PlantUML | 16 | 2 | 89% | 6 | — | Approved |
What people said
23 of the 28 comments that mention it, newest first. Each links to the original comment.
“that's the kind of boring tool I bookmark and come back to on every migration”
“I don't see the problem with this tool, it's just showing the tables.”
“it zooms in on safari mobile when pressing a text field”
“Nice, but there is no LICENSE file in the github”
“this layout isn't optimal as per your constraints”
“what is here now is so well crafted that it feels uncomfortable asking for features”
“This is cool! People actually need sthng like this.”
“I was really in need of something like this to visualise my schemas”
“Great stuff, well done and super useful!”
“The tool looks very cool! But IMO you can't get an ER diagram from SQL since entities are fundamentally different from tables.”
“this seems like a worthwhile tradeoff for not having to store anything”
“Such an old problem solved very elegantly. Congrats.”
“Small? Yes, but perfectly formed!”
“just got reminded of that project after looking at this great implementation”
“It’s responsive, clean and “onboarding” experience without signup walls is great.”
“I can see a use for the diagramming bits for more than ER diagrams.”
“Author(s) did the homework.”
“Definitely one of the best mobile friendly site I have seen.”
“Panning, Zooming, selecting and moving was so seamless I thought I was tripping out.”
“Okay thats pretty cool. Nice job!”
“I’ve never really liked the bendy ones.”
“I was looking for it, thanks! Great work!”
“No backend, no accounts, no data leaving your machine.”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.