postgres
Postgres.js is a lightweight, fast Node.js/Deno/Bun PostgreSQL client built on ES6 tagged template literals. It handles query parameterization, dynamic SQL building, and connection pooling with a minimal API surface.
Key facts
Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.
| Field | Value |
|---|---|
| Repository | porsager/postgres |
| Owner | porsager |
| Primary language | JavaScript |
| License | Unlicense — OSI-approved |
| Stars | 8.7k |
| Forks | 353 |
| Open issues | 262 |
| Latest release | v3.4.9 (2026-04-05) |
| Last updated | 2026-04-05 |
| Source | https://github.com/porsager/postgres |
What postgres is
A protocol-level PostgreSQL driver using tagged template literals for safe, parameterized queries and dynamic SQL composition. Supports transactions, listen/notify, custom type handlers, and connection pooling across Node.js, Deno, and Bun runtimes.
Get the postgres source
Clone the repository and explore it locally.
git clone https://github.com/porsager/postgres.gitcd postgres# follow the project's README for install & configurationNeed it deployed, integrated, or customized instead? DEV.co ships production installs.
Best use cases
Implementation considerations
- Connection pooling is handled by the client; configure min/max pool size based on workload. Environment variables (psql convention) are read automatically for host, port, database, username, password.
- Tagged template literals require inline SQL; parameterized values are sent separately to PostgreSQL for safe handling. Do not wrap interpolations in quotes—let Postgres handle type inference.
- TypeScript support is available; verify type definitions match your target version, especially for custom type handlers.
- Transactions are supported; use reserved connections if multi-statement atomicity is required.
- Error handling follows standard async/await patterns; errors include PostgreSQL error codes and should be caught and logged appropriately.
When to avoid it — and what to weigh
- You require an ORM with schema migration tooling — Postgres.js is a driver, not an ORM. No built-in migrations, model definitions, or relationships. Requires manual schema management.
- You need a heavily abstracted, database-agnostic API — Tightly coupled to PostgreSQL and its wire protocol. Not suitable for multi-database projects or vendors who want SQL dialects abstracted.
- Your team is unfamiliar with async/await and template literals — Requires comfort with modern JavaScript syntax and promise-based concurrency. Lower barrier than raw node-postgres but higher than traditional ORMs.
- You need formal support and SLA guarantees — Community-driven open-source project under Unlicense. No commercial support contracts or guaranteed response times documented.
License & commercial use
Licensed under The Unlicense, a public domain dedication. No copyright restrictions; code can be used, modified, and distributed freely without attribution or license notices.
The Unlicense is permissive and places code in the public domain, allowing commercial use without restriction. However, there is no warranty or liability clause; use at your own risk in production. Verify your organization's legal stance on public domain software.
DEV.co evaluation signals
Editorial assessment — not user reviews. Directional, with an explicit confidence level.
| Signal | Assessment |
|---|---|
| Maintenance | Active |
| Documentation | Adequate |
| License clarity | Clear |
| Deployment complexity | Low |
| DEV.co fit | Good |
| Assessment confidence | High |
Parameterized queries via tagged template literals prevent SQL injection when used correctly. Do not concatenate user input as SQL strings. Connection credentials should be managed via environment variables or secure vaults, not hardcoded. No security audit data provided; no formal vulnerability reporting process documented in the data.
Alternatives to consider
node-postgres (pg)
Mature, widely adopted Node.js PostgreSQL driver. Heavier feature set and more ecosystem support, but less performance-optimized than postgres.js. Better documentation and formal backing.
Prisma
Full ORM with schema migrations, type-safe queries, and multi-database support. Higher abstraction layer with better IDE support, but introduces runtime overhead and vendor lock-in.
TypeORM
Another full ORM with decorator-based entity definitions and migrations. More flexible than Prisma but steeper learning curve. Better suited for enterprise projects with complex schemas.
Build on postgres with DEV.co software developers
Postgres.js offers a fast, minimal-overhead driver for modern JavaScript runtimes. Explore implementation with your team or discuss migration from heavier ORMs.
Talk to DEV.coRelated open-source tools
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postgres FAQ
Is postgres.js safe from SQL injection?
Does postgres.js support transactions?
Can I use postgres.js with TypeScript?
What about connection pooling and concurrency?
Software developers & web developers for hire
Adopting postgres is usually one piece of a larger software development effort. As a software development agency, DEV.co provides software development services and web development expertise — pairing senior software developers and web developers with your team to design, build, and operate open-source databases software in production.
Ready to optimize your PostgreSQL integration?
Postgres.js offers a fast, minimal-overhead driver for modern JavaScript runtimes. Explore implementation with your team or discuss migration from heavier ORMs.