💙 Supporting healthcare non-profits: Metadataloop is free for 6–12 months. Contact Us to get started.
Free Online Tool

Free dbdiagram.io Alternative

Generate ER diagrams from SQL without signing up — DBML, Mermaid, and SchemaSpy all in one place.

Try the SQL → DBML / Mermaid Converter →

Overview

dbdiagram.io is great, but it requires an account, has limits on the free tier, and locks you into its DBML-first workflow. MetaDataLoop offers a free, no-signup workflow for ER diagrams from SQL: paste any number of CREATE TABLE statements and convert them to DBML (compatible with dbdiagram.io), Mermaid erDiagram (renders in GitHub), or browse them in an interactive schema explorer.

What you get

✓ INCLUDED
No signup required — paste and convert in 5 seconds
✓ INCLUDED
Both DBML and Mermaid output from the same SQL paste
✓ INCLUDED
Bundled with schema diff, migration generator, mock data, and AI docs
✓ INCLUDED
Works on PostgreSQL, MySQL, Snowflake, SQL Server, T-SQL
✓ INCLUDED
Output is plain text — copy to GitHub, Notion, dbdiagram.io, or anywhere

Side-by-side comparison

Featuredbdiagram.ioMetaDataLoop
Signup requiredYesNo
SQL → DBMLManual pasteOne click
SQL → MermaidNoYes
Schema explorer viewNoYes
Schema diffNoYes
Mock data generationNoYes
Migration script genNoYes
AI documentationNoYes
Price (free tier)LimitedUnlimited

Frequently asked questions

Can I import my dbdiagram.io project here?
Use dbdiagram.io's 'Export to SQL' feature, then paste that SQL into our Mermaid/DBML converter or schema explorer.
Is the DBML output compatible with dbdiagram.io?
Yes — paste it directly into the dbdiagram.io editor and the diagram renders. Or stay here and use our schema explorer instead.
What about diagram aesthetics?
We're focused on developer workflow — text-in, text-out, render anywhere. For pixel-perfect visual diagrams, dbdiagram.io's UI is more polished. For embedding in GitHub READMEs, Mermaid is the better path.

Try it now

No signup, no install — runs entirely in your browser.

Try the SQL → DBML / Mermaid Converter →
Related Tools
SQL to DBML Converter SQL to Mermaid erDiagram Converter

⚠ Confirm Delete