super fast, all natural json logger

Usage no npm install needed!

<script type="module">
  import pino from '';




npm version Build Status Known Vulnerabilities js-standard-style

Very low overhead Node.js logger.



$ npm install 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 be 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 to being bundled using tools like webpack or esbuild.

See Bundling document for more informations.

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.

Logo and identity designed by Cosmic Fox Design:


Licensed under MIT.