Connection String Builder

Connection String Builder — Free Online Tool

Parse, generate, validate, and convert database connection strings for all 14 supported database providers. Everything runs in your browser — nothing is uploaded.

Why Use a Connection String Builder?

• Save Time: Generate correct connection strings instantly instead of reading docs
• Avoid Errors: Built-in validation catches typos and misconfigurations
• Multi-Format: Generate URI, JDBC, Spring Boot, Prisma, .env, Docker Compose, K8s Secrets, CLI commands, and more
• Parse & Learn: Paste an existing connection string to auto-detect the provider and populate all fields
• Security-Aware: Built-in security analysis flags hardcoded passwords, missing SSL, and other risks
• 14 Databases: PostgreSQL, MySQL, MariaDB, SQLite, SQL Server, Oracle, MongoDB, Redis, Elasticsearch, RabbitMQ, Kafka, ClickHouse, Cassandra, CockroachDB

🚀 Key Features

Visual Builder

Select your database type from 14 providers and fill in the connection fields. The UI adapts to show provider-specific options like SSL modes, connection pool settings, and advanced parameters.

Smart Parsing

Paste any existing connection string (URI format, JDBC, or DSN) and the tool automatically detects the database type and populates all fields. No manual re-typing.

Multi-Format Output

Generate connection strings in 20+ output formats including:

• URI: Standard connection URI for direct use
• JDBC: Java Database Connectivity URL
• Spring Boot: Full application.properties configuration
• Prisma: Prisma ORM datasource + .env
• Sequelize / TypeORM / Drizzle: ORM-specific configs
• Django: settings.py database configuration
• SQLAlchemy: Python engine URL
• ADO.NET: .NET connection string
• Docker Compose: Complete docker-compose.yml with environment
• Kubernetes Secret: K8s Secret + ConfigMap manifest
• .env: Environment variables
• CLI Commands: psql, mysql, mongosh, redis-cli

Security Analysis

Every connection is analyzed for security issues:

• Hardcoded passwords flagged with recommendations for env vars
• Missing SSL/TLS on remote connections detected
• Default port usage warnings
• Wildcard host binding (0.0.0.0) warnings

Validation Engine

Real-time validation checks:

• Hostname format validation
• Port range (1-65535)
• Database name presence
• SSL configuration warnings for remote hosts
• Password strength hints

Example Library

18 pre-built examples covering local dev, production, cloud, and serverless setups. Quick-load any example to see how different configurations map to output formats.

🛠️ How to Use

1. Select a database — Choose from 14 providers (PostgreSQL, MySQL, MongoDB, etc.)
2. Fill in fields — Enter host, port, database name, credentials, and SSL settings
3. Add advanced params — Expand "Additional Parameters" for connection tuning (pools, timeouts, SSL certs)
4. Copy any format — Switch between URI, JDBC, Prisma, Docker Compose, and more
5. Parse an existing string — Paste a connection string to auto-populate all fields

🗄️ All 14 Supported Databases

Each database has its own dedicated builder with provider-specific fields, SSL modes, and advanced parameters.

Tip: Choose a database below to open its dedicated builder with tailored fields and connection examples. A generic builder is also available above for quick edits.

❓ Frequently Asked Questions

Is my connection string data uploaded?

No. Everything runs 100% in your browser. No data is ever sent to any server. Your credentials never leave your device.

What database types are supported?

PostgreSQL, MySQL, MariaDB, SQLite, SQL Server, Oracle, MongoDB, Redis, Elasticsearch, RabbitMQ, Kafka, ClickHouse, Cassandra, and CockroachDB — 14 database providers total.

What output formats are available?

20+ formats including URI, JDBC, Spring Boot, Prisma, Sequelize, TypeORM, Drizzle, Django, SQLAlchemy, ADO.NET, Docker Compose, Kubernetes Secrets, .env, psql CLI, MySQL CLI, mongosh, redis-cli, RabbitMQ config, Kafka config, and Elasticsearch config.

Can I parse an existing connection string?

Yes. Paste any URI, JDBC, or DSN-format connection string into the parser input and the tool will auto-detect the database type and populate all fields.

How is this different from other connection string generators?

Most connection string generators only output a single format. This tool is a complete connection string workstation: parse existing strings, build visually with validation, preview 20+ output formats simultaneously, and export infrastructure-as-code (Docker Compose, K8s Secrets).

Do I need to create an account?

No. All LangStop tools are free and require no sign-up, no login, and no account.

Is this tool free?

Yes. This tool is completely free to use with no limitations or hidden costs.

Privacy & Security

Connection String Builder processes everything locally in your browser. No connection strings, credentials, or configuration data are ever transmitted to any server.

The source code runs entirely client-side using Next.js static generation. Your database credentials remain private and under your control at all times.