Database Connection String Builder

How to use

1. 1Pick a driver in the top grid. Each tile shows the scheme, default port, and whether TLS is implicit for that driver.
2. 2Fill in the username and password. The mask-password toggle hides the password in every output panel so the page is screenshot-safe.
3. 3Enter one or more hosts. Drivers that support seed lists (Postgres failover, MongoDB seed list, CockroachDB) let you add or remove host rows.
4. 4Set the database name (or the database index for Redis, or the vhost for AMQP) and pick the TLS mode. Require TLS sets the driver's standard flag.
5. 5Add any driver-specific options as key, value rows (replicaSet, authSource, application_name, retryWrites, encrypt). They become query parameters, or semicolon properties for JDBC SQL Server.
6. 6Copy the final URI, or grab the ready-to-paste .env line, docker-compose env line, JSON config snippet, or CLI command from the output panels.

About this tool

Database Connection String Builder is the inverse of the connection string parser. Pick the driver (PostgreSQL, MySQL, MariaDB, MongoDB seed list, MongoDB SRV, Redis, Redis TLS, SQL Server URL, SQL Server JDBC, CockroachDB, ClickHouse, RabbitMQ AMQP and AMQPS), then fill in structured fields: username, password, one or more hosts with ports, database name, TLS mode, and a free-form list of driver-specific key, value options. The tool percent-encodes the userinfo segment so a literal @, /, :, or % in a password does not corrupt the URI; brackets IPv6 hosts automatically when colons are detected; respects the default port for the chosen driver as a placeholder while omitting an empty port from the final string; converts between standard URL-style query parameters and the JDBC semicolon property syntax used by jdbc:sqlserver://host:port;property=value;property=value; and applies driver-specific defaults for TLS (sslmode=require on Postgres and CockroachDB, useSSL=true on MySQL, tls=true on MongoDB, encrypt=true on SQL Server, secure=true on ClickHouse) when you toggle TLS on. The output panel shows the canonical URI plus three deployment shapes ready to paste: a .env file line keyed by the driver's conventional variable name (DATABASE_URL, MONGODB_URI, REDIS_URL, JDBC_URL), a docker-compose environment line, and a one-key JSON config snippet. A driver-aware CLI command is also generated where it makes sense: psql for Postgres, mongosh for MongoDB and MongoDB SRV, redis-cli for Redis (with -u for TLS), sqlcmd for SQL Server, mysql and mariadb for the MySQL family, cockroach sql for CockroachDB, and clickhouse-client for ClickHouse. A masked-password toggle is on by default so the page is safe to screenshot and share. A Notes and warnings panel catches the most common mistakes: a port outside 1 to 65535, multi-host MongoDB without a replica set name, multiple hosts on a driver that takes only one, and a non-empty password with TLS disabled. Seven presets cover everyday setups (Postgres on localhost, Postgres on cloud with TLS, MySQL on localhost, MongoDB Atlas SRV, MongoDB replica set, Redis TLS, SQL Server JDBC) so you can apply a template and tweak from there. Useful for writing a fresh env var on a new project, normalizing a connection string before handing it to a deploy pipeline, learning each driver's URI shape, and prepping config blocks for docker-compose and Kubernetes manifests. Everything runs in your browser. No database is contacted, no DNS is resolved, no credentials are uploaded.

Free to use. Works in your browser. No signup, no login.