How do I get my PostgreSQL connection string?

In your database provider's dashboard, click Connect to retrieve your connection string. It typically looks like: postgresql://user:password@host:5432/dbname.

Which connection method should I use?

Select the Transaction pooler option. This ensures compatibility with stateless applications and allows dbdiagramr to detect connections properly.

What if I forgot my database password?

Regenerate your password in the Shared pooler section of your database provider's dashboard and copy-paste the new credentials into your connection string.

SQL to Schema Diagram Online: Convert SQL to ERD in Seconds

The short version

You have SQL. You need a diagram. The fastest path from CREATE TABLE to a visual schema is a tool that parses SQL and renders an ER diagram on the spot.

dbdiagramr does exactly that -- paste your SQL, get an interactive diagram in seconds. No signup, no install, no export limits.

Why convert SQL to a schema diagram?

SQL is precise. Diagrams are comprehensible. When you're onboarding to a new codebase or explaining a schema to a non-technical stakeholder, a visual representation does something SQL can't: it shows relationships at a glance.

Reading 200 lines of CREATE TABLE statements, you'll find the foreign keys eventually. Seeing them drawn as lines between boxes takes half a second.

How to convert SQL to a schema diagram online

Step 1: Get your SQL

Grab your schema from one of these sources:

pg_dump --schema-only yourdb
Migration files (Prisma, Drizzle, Rails, Django)
Your IDE's schema export
A SQL file you already have

Step 2: Paste into dbdiagramr

Go to dbdiagramr.com/visualize and paste your SQL in the editor. The tool parses CREATE TABLE statements, detects primary keys, and maps foreign key relationships automatically.

Step 3: Explore and export

Your ER diagram appears instantly. Pan, zoom, drag tables around to arrange them. When you're happy, export as SVG or PNG with one click.

What SQL syntax works?

dbdiagramr understands standard PostgreSQL syntax:

CREATE TABLE with columns and types
PRIMARY KEY constraints
REFERENCES for foreign keys
DEFAULT values
NOT NULL and UNIQUE constraints
ON DELETE and ON UPDATE actions

If your SQL is valid PostgreSQL, dbdiagramr will parse it.

Example: converting a Laravel migration

If you're using Laravel, your migrations live in database/migrations/. Export them to SQL and paste the result:

-- Laravel migration exported to SQL
CREATE TABLE users (
  id BIGSERIAL PRIMARY KEY,
  name VARCHAR(255) NOT NULL,
  email VARCHAR(255) UNIQUE NOT NULL,
  password VARCHAR(255) NOT NULL,
  remember_token VARCHAR(100),
  created_at TIMESTAMPTZ,
  updated_at TIMESTAMPTZ
);

CREATE TABLE posts (
  id BIGSERIAL PRIMARY KEY,
  user_id BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  title VARCHAR(255) NOT NULL,
  slug VARCHAR(255) UNIQUE NOT NULL,
  body TEXT,
  published BOOLEAN DEFAULT FALSE,
  created_at TIMESTAMPTZ,
  updated_at TIMESTAMPTZ
);

dbdiagramr renders the users and posts tables with the foreign key relationship drawn between them. Done in seconds.

Alternative methods (and why they're slower)

Method	Setup	Speed	Limitation
pgAdmin ERD tool	Already installed	Medium	Snapshot, manual re-run
Draw.io + manual	Short	Slow	Hand-draw every table
dbdiagram.io	Account required	Fast	Must learn DBML syntax
dbdiagramr	None	Instant	PostgreSQL only (for now)

dbdiagramr is the only option that requires zero setup and accepts raw SQL directly.

FAQ

Can I convert MySQL SQL to a diagram?
Not yet. dbdiagramr currently supports PostgreSQL syntax only. MySQL support is planned.

Does it work with Prisma schema files?
Not directly. Export your Prisma schema to SQL first with prisma db pull or pg_dump, then paste the SQL.

How large a schema can it handle?
dbdiagramr handles schemas with dozens of tables comfortably. Very large schemas (100+ tables) may need some manual arrangement, but the parsing works fine.

Is there a table limit?
No. Paste as many tables as you want. No signup, no limits.