fast-xml-parser
Efficient XML parsing and validation library.
Pricing
Free tier
Flat rate
Adoption
→StableLicense
Open Source
Data freshness
Aging · Jun 8, 2026Overview
What is fast-xml-parser?
Fast-XML-Parser is a high-performance JavaScript library for validating and parsing XML documents. It offers fast processing speeds and supports both synchronous and asynchronous operations, making it ideal for applications that require efficient handling of XML data.
Key differentiator
“Fast-XML-Parser stands out with its high-performance parsing capabilities and support for both synchronous and asynchronous operations, making it a robust choice for developers needing efficient XML handling.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
The library provides minimal feedback on parsing errors, making debugging difficult.
Advanced configuration options and custom parsers are not well-documented, leading to a steep learning curve.
The parser's performance significantly drops when dealing with deeply nested or large XML files.
Fit analysis
Who is it for?
✓ Best for
Developers working with XML data who need fast and efficient parsing capabilities
Projects that require both synchronous and asynchronous XML handling
Applications needing flexible configuration options for custom parser behavior
✕ Not a fit for
Scenarios where XML is not the primary data format being used
Real-time streaming applications requiring constant XML updates
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 fast-xml-parser
Step-by-step setup guide with code examples and common gotchas.