Use Connection String Builder online for free. No installation, no signup — works directly in your browser.
100% free, no signup required. Works entirely in your browser.
Open Connection String BuilderEnter your data or configure options.
The tool processes your input.
Copy or download the result.
The builder creates connection strings for PostgreSQL, MySQL, MariaDB, SQLite, SQL Server, MongoDB, Redis, Oracle, CockroachDB, and more. Each database's specific connection string format and available options are supported including SSL/TLS settings, connection pooling parameters, and authentication methods.
Generated connection strings follow each database's official format specification and include commonly needed options like SSL mode, timeout settings, and connection pool sizes. They are ready for use in application configuration files, environment variables, and ORM settings. Always use environment variables for credentials.
All connection string assembly occurs in your browser with no server communication. Hostnames, ports, credentials, and database names are never transmitted externally. However, we recommend never sharing or committing connection strings containing real passwords — use environment variables instead.
