pify

Promisify callback-style functions for modern JavaScript development.

DecliningOpen SourceLow lock-in

Pricing

Free tier

Flat rate

Adoption

Cooling

License

Open Source

Data freshness

Aging · Jun 8, 2026

Overview

What is pify?

Pify is a small utility that converts callback-based functions into promise-returning ones. This tool simplifies the use of asynchronous operations in JavaScript, making it easier to work with promises and async/await syntax.

Key differentiator

Pify stands out as a lightweight, easy-to-use utility for converting callback functions into promises, making it ideal for developers looking to modernize their JavaScript codebases without significant refactoring.

Capability profile

Capability Radar

Ease of StartEcosystemValueMaturityFlexibilityScale Ready

Honest assessment

Strengths & Weaknesses

↑ Strengths

Converts callback functions to promise-based onesmedium

Simplifies asynchronous code with modern JavaScript featuresmedium

Lightweight and easy to integrate into projectsmedium

↓ Weaknesses

Limited functionality for complex asynchronous operationshigh

Pify only converts simple callback functions into promises and does not handle more complex scenarios such as nested callbacks or error handling comprehensively.

Does not support async/await natively without additional setupmedium

While Pify can convert functions to return promises, using these with async/await requires further configuration and understanding of promise-based patterns.

Small community and limited active developmenthigh

Given its niche functionality, the tool has a relatively small user base and infrequent updates, which may lead to slower resolution of issues or feature requests.

Potential for increased cognitive load in understanding converted codemedium

The conversion from callbacks to promises can sometimes obscure the original logic flow, making debugging and maintenance more challenging.

Fit analysis

Who is it for?

✓ Best for

Developers working on projects that need to transition from callback-based functions to promises

Teams looking to modernize their codebase and take advantage of async/await syntax in JavaScript

✕ Not a fit for

Projects that do not use or plan to use promise-based operations

Developers who prefer sticking with traditional callback patterns for asynchronous programming

Cost structure

Pricing

Free Tier

Available

Open source — free to use

Starts at

$0

Model

Flat rate

Enterprise

None

Performance benchmarks

How Fast Is It?

Ecosystem

Relationships

Works well with

Next step

Get Started with pify

Step-by-step setup guide with code examples and common gotchas.

View Setup Guide →