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.

← All tools

Free tool

PostgreSQL connection string builder

Build a PostgreSQL connection URI from parts, or paste one to decode every field. Presets for Supabase, Neon, and Railway. Passwords never leave your browser.

Build a connection string

UserPassword

Host

PortDatabase

SSL mode

postgresql://postgres.PROJECT_REF@aws-0-eu-central-1.pooler.supabase.com:5432/postgres?sslmode=require

Decode a connection string

Paste a URI to see every part decoded, user, host, port, database, and parameters.

Frequently asked questions

What is the format of a PostgreSQL connection string?

postgresql://user:password@host:port/dbname?sslmode=require. The user and password are percent-encoded when they contain special characters, port defaults to 5432, and query parameters carry options like sslmode, connect_timeout, and application_name.

Is it free?

Yes, completely free with no signup. Build URIs from parts or decode pasted URIs, presets cover Supabase pooler and direct, Neon, Railway, and localhost.

Is my password uploaded anywhere?

No. Building and parsing run entirely in your browser. Nothing is sent to a server, and when you open the result in dbdiagramr, the connection string travels via sessionStorage, never via URL parameters or server logs.

Which providers are supported?

Any PostgreSQL URI parses, and presets prefill Supabase (Session pooler 5432 and Direct), Neon (pooled host, sslmode=require), Railway, and localhost. Transaction poolers (Supabase 6543) decode fine but cannot run schema introspection, use Session mode for visualization.

Can I visualize the database this connects to?

Yes. Click Open in dbdiagramr to hand the connection string to the visualizer securely (sessionStorage, not URL params) and get an interactive ER diagram of the live schema.

Related tools

PostgreSQL ER Diagram →

Free, no signup. Visualize your PostgreSQL schema in seconds.

Learn more

Free Online Database Diagram Tool →SQL to Schema Diagram Online →Schema Health Check Guide →Schema Library →All tools →

Keep exploring

PostgreSQL ER Diagram Tool →

Turn it into an ER diagram

Paste your PostgreSQL connection string and get an interactive ER diagram of your own schema in under 10 seconds. No signup required.

Try it free →View on GitHub