metro-config
Config parser for Metro, the JavaScript transformer and bundler.
Pricing
Free tier
Flat rate
Adoption
→StableLicense
Open Source
Data freshness
Aging · Jun 8, 2026Overview
What is metro-config?
Metro is a fast JavaScript bundler used primarily in React Native projects. metro-config provides configuration parsing capabilities to customize how Metro operates within these environments.
Key differentiator
“metro-config is specifically designed to work with Metro, providing developers working on React Native projects with precise control over their build configurations.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
metro-config heavily relies on JavaScript and React Native ecosystem patterns, which may be unfamiliar to developers from other backgrounds.
The official documentation lacks comprehensive guides and practical examples for advanced use cases of metro-config.
Upgrading to newer versions often requires significant updates in configuration files due to API changes, causing disruptions in development workflows.
Metro bundler can become slow and resource-intensive when dealing with large codebases, impacting developer productivity during build processes.
Fit analysis
Who is it for?
✓ Best for
React Native developers who need to customize their build process using Metro
Projects requiring specific configuration settings for the Metro bundler
✕ Not a fit for
Projects not utilizing React Native or Metro as a JavaScript transformer and bundler
Developers looking for a general-purpose configuration tool outside of the context of React Native
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
Next step
Get Started with metro-config
Step-by-step setup guide with code examples and common gotchas.