Turn a schema dump into a diagram your team can actually read — without redrawing boxes by hand.
Paste your CREATE TABLE statements and get a Mermaid entity-relationship diagram — entities, columns, keys and inferred relationships you can drop straight into docs.
Free tier: 5 diagram generations per month · or unlock forever for $4.99
Mermaid erDiagram
Entities
Relationships
Illustrative — paste CREATE TABLE statements, get a Mermaid diagram with inferred relationships.
Every card is something members actually do inside Datamata — not a vague promise.
Paste your CREATE TABLE statements and get a readable diagram without redrawing boxes.
Foreign keys and naming conventions become labelled relationships with cardinality.
Mermaid shows up in GitHub, Notion and most docs tools with no extra plugins to install.
Generates Mermaid erDiagram code from raw CREATE TABLE statements
Feature deep-dives
See it work
Paste your CREATE TABLE statements and get a readable diagram without redrawing boxes.
Try SQL to ERDMermaid erDiagram
Entities
Relationships
Illustrative — paste CREATE TABLE statements, get a Mermaid diagram with inferred relationships.
Go deeper
Foreign keys and naming conventions become labelled relationships with cardinality.
Browse all premium toolsIn practice
Mermaid shows up in GitHub, Notion and most docs tools with no extra plugins to install.
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Generates Mermaid erDiagram code from raw CREATE TABLE statements
Infers relationships from foreign keys and naming conventions, with cardinality
Renders in GitHub, Notion and most docs tools with zero extra setup
Quick start guide
Build a diagram in three steps — paste your table definitions, let the tool infer relationships then copy the Mermaid code.
Drop in one or many CREATE TABLE statements from your schema.
Foreign keys and id naming patterns become labelled relationships automatically.
Paste the erDiagram block into your README or wiki and it renders inline.
Need the tables first? The JSON to SQL Schema Generator turns sample data into DDL you can diagram.
What's included
Generates Mermaid erDiagram code from raw CREATE TABLE statements
Infers relationships from foreign keys and naming conventions, with cardinality
Renders in GitHub, Notion and most docs tools with zero extra setup
Free tier includes monthly diagrams; Pro unlocks unlimited generation
Start free, upgrade when you need more.
Pro
$9.99/moUnlimited ERD generation with relationship inference
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