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npm version Build Status js-standard-style

Very low overhead Node.js logger.



Using NPM:

$ npm install pino

Using YARN:

$ yarn add pino

If you would like to install pino v6, refer to


const logger = require('pino')()'hello world')

const child = logger.child({ a: 'property' })'hello child!')

This produces:

{"level":30,"time":1531171074631,"msg":"hello world","pid":657,"hostname":""}
{"level":30,"time":1531171082399,"msg":"hello child!","pid":657,"hostname":"","a":"property"}

For using Pino with a web framework see:


Development Formatting

The pino-pretty module can be used to format logs during development:

pretty demo

Transports & Log Processing

Due to Node's single-threaded event-loop, it's highly recommended that sending, alert triggering, reformatting, and all forms of log processing are conducted in a separate process or thread.

In Pino terminology, we call all log processors "transports" and recommend that the transports be run in a worker thread using our pino.transport API.

For more details see our Transports⇗ document.

Low overhead

Using minimum resources for logging is very important. Log messages tend to get added over time and this can lead to a throttling effect on applications – such as reduced requests per second.

In many cases, Pino is over 5x faster than alternatives.

See the Benchmarks document for comparisons.

Bundling support

Pino supports being bundled using tools like webpack or esbuild.

See Bundling document for more information.

The Team

Matteo Collina

David Mark Clements

James Sumners

Thomas Watson Steen


Pino is an OPEN Open Source Project. This means that:

Individuals making significant and valuable contributions are given commit-access to the project to contribute as they see fit. This project is more like an open wiki than a standard guarded open source project.

See the file for more details.


This project was kindly sponsored by nearForm. This project is kindly sponsored by Platformatic.

Logo and identity designed by Cosmic Fox Design:


Licensed under MIT.