XML Parsing Libraries Comparison
fast-xml-parser vs xml2js vs xml-js
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What's XML Parsing Libraries?

XML parsing libraries are essential tools in web development that allow developers to convert XML data into JavaScript objects and vice versa. These libraries facilitate the manipulation and extraction of data from XML documents, which are commonly used in web services, configuration files, and data interchange formats. Each library offers unique features and performance characteristics, making them suitable for different use cases, such as speed, ease of use, and flexibility in handling XML structures.

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fast-xml-parser25,557,0792,606174 kB61a day agoMIT
xml2js21,453,4024,9083.44 MB245a year agoMIT
xml-js2,112,7231,295-1236 years agoMIT
Feature Comparison: fast-xml-parser vs xml2js vs xml-js

Performance

  • fast-xml-parser:

    fast-xml-parser is designed for speed and efficiency, making it one of the fastest XML parsers available. It minimizes memory usage and optimizes parsing time, making it suitable for applications that require quick processing of large XML files.

  • xml2js:

    xml2js is generally slower than fast-xml-parser but offers more features and flexibility. It is suitable for applications where performance is important but not the primary concern, allowing for more complex XML handling.

  • xml-js:

    xml-js offers moderate performance, focusing more on simplicity and ease of use than on raw speed. While it may not be the fastest option for large XML files, it provides a good balance for smaller documents and straightforward use cases.

Ease of Use

  • fast-xml-parser:

    fast-xml-parser has a straightforward API but may require some initial configuration to get the best performance. It is user-friendly for those familiar with XML parsing but might have a slight learning curve for beginners.

  • xml2js:

    xml2js has a more complex API due to its extensive options and configurations. While it provides powerful features, it may require a deeper understanding of its API to utilize effectively.

  • xml-js:

    xml-js is known for its simplicity and ease of use, making it an excellent choice for developers who want to quickly convert XML to JSON and vice versa without dealing with complex configurations.

Flexibility

  • fast-xml-parser:

    fast-xml-parser offers limited flexibility in terms of customization compared to xml2js. It is optimized for performance, which may restrict some advanced parsing options.

  • xml2js:

    xml2js excels in flexibility, allowing developers to customize the parsing process extensively. It supports various options for handling attributes, namespaces, and other XML-specific features.

  • xml-js:

    xml-js provides basic flexibility for converting XML to JSON and back, but it lacks advanced features for handling complex XML structures or custom parsing rules.

Error Handling

  • fast-xml-parser:

    fast-xml-parser has basic error handling capabilities, focusing on performance. It may not provide detailed error messages, which can be a drawback for debugging complex XML documents.

  • xml2js:

    xml2js provides comprehensive error handling and validation features, making it ideal for applications that need to ensure the integrity of the XML data being processed.

  • xml-js:

    xml-js offers minimal error handling, primarily focusing on conversion without extensive validation or error reporting, making it less suitable for critical applications that require robust error management.

Community and Support

  • fast-xml-parser:

    fast-xml-parser has a growing community and is actively maintained, but it may not have as extensive documentation or community support as more established libraries.

  • xml2js:

    xml2js benefits from a large user base and extensive documentation, making it easier to find support, tutorials, and community-contributed resources.

  • xml-js:

    xml-js has a smaller community and limited support resources, which may pose challenges for developers seeking help or examples.

How to Choose: fast-xml-parser vs xml2js vs xml-js
  • fast-xml-parser:

    Choose fast-xml-parser if you need a lightweight and high-performance solution for parsing XML. It is particularly useful for applications where speed is critical and can handle large XML files efficiently.

  • xml2js:

    Opt for xml2js if you need a comprehensive and flexible solution with extensive configuration options. It is well-suited for complex XML structures and provides robust features for customizing the parsing process.

  • xml-js:

    Select xml-js if you require a simple and straightforward library that provides a clear and easy-to-use API for converting XML to JSON and back. It is ideal for projects that prioritize ease of use and readability over performance.

Similar Npm Packages to fast-xml-parser

fast-xml-parser is a lightweight and efficient XML parser for JavaScript and Node.js applications. It allows developers to quickly convert XML data into JavaScript objects, making it easier to manipulate and work with XML data in a more familiar format. With its focus on performance and ease of use, fast-xml-parser is a popular choice for projects that require XML parsing capabilities. However, there are several alternatives available that also provide XML parsing functionalities. Here are a few notable ones:

  • xml-js is a library that converts XML to JavaScript objects and vice versa. It provides a straightforward API for parsing XML and serializing JavaScript objects back into XML format. xml-js is particularly useful for projects that require bidirectional conversion between XML and JavaScript, making it a versatile choice for developers who need to handle both parsing and serialization.
  • xml-parser is a simple and efficient XML parser that focuses on providing a minimalistic approach to parsing XML data. It converts XML into a JavaScript object and is designed for ease of use, making it a good option for developers who need a straightforward solution without the overhead of additional features. If you are looking for a lightweight parser that gets the job done without any frills, xml-parser is a solid choice.
  • xml2js is a widely used XML to JavaScript object converter that offers a rich set of features. It provides options for customizing the parsing process, including handling attributes, preserving namespaces, and more. xml2js is suitable for projects that require more control over the parsing process and need to handle complex XML structures. Its flexibility makes it a popular choice among developers working with XML data.

To see how fast-xml-parser compares with xml-js, xml-parser, and xml2js, check out the comparison: Comparing fast-xml-parser vs xml-js vs xml-parser vs xml2js.

Similar Npm Packages to xml2js

xml2js is a popular Node.js library that allows developers to parse XML into JavaScript objects and vice versa. It provides a simple and straightforward API for converting XML data into a more manageable format, making it easier to work with in JavaScript applications. While xml2js is widely used, there are other libraries available that offer similar functionality. Here are a few alternatives:

  • fast-xml-parser is a high-performance XML parser that is designed to be fast and lightweight. It provides a simple API for parsing XML into JavaScript objects and can handle large XML files efficiently. One of the standout features of fast-xml-parser is its ability to validate XML against a schema, which can be beneficial for ensuring data integrity. If performance is a critical factor in your application and you need a parser that can handle large datasets quickly, fast-xml-parser is an excellent choice.
  • xml-js is another library that converts XML to JavaScript objects and vice versa. It focuses on simplicity and ease of use, providing a clear API for developers. xml-js supports various options for customizing the conversion process, allowing you to tailor the output to your specific needs. If you are looking for a straightforward solution for XML parsing without the need for advanced features, xml-js is a solid option.

To see how xml2js compares with fast-xml-parser and xml-js, check out the comparison: Comparing fast-xml-parser vs xml-js vs xml2js.

Similar Npm Packages to xml-js

xml-js is a popular npm package that provides a simple and efficient way to convert XML data to JavaScript objects and vice versa. This library is particularly useful for developers who need to work with XML data in their applications, allowing for easy manipulation and access to the data structure. With its straightforward API, xml-js can be integrated seamlessly into various JavaScript projects, making it a go-to choice for XML parsing and serialization.

While xml-js is a solid option for XML processing, there are other libraries that offer similar functionality. Here are a couple of alternatives:

  • fast-xml-parser is a lightweight and fast XML parser that focuses on performance. It is designed to handle large XML files efficiently and provides a simple API for converting XML to JSON and vice versa. fast-xml-parser supports various features such as attribute parsing, tag name conversion, and customizable options, making it a versatile choice for developers looking for speed and flexibility in XML processing.
  • xml2js is another widely used library for parsing XML into JavaScript objects. It offers a straightforward API and is known for its ease of use. xml2js allows for customizable parsing options, enabling developers to tailor the conversion process to their specific needs. It is a great choice for those who require a reliable and well-established library for XML parsing in their applications.

To compare these libraries and see how they stack up against each other, check out the following link: Comparing fast-xml-parser vs xml-js vs xml2js.

README for fast-xml-parser

fast-xml-parser

[![NPM quality][quality-image]][quality-url] Coverage Status Try me NPM total downloads

Validate XML, Parse XML to JS Object, or Build XML from JS Object without C/C++ based libraries and no callback.

ads-thePowerGlassesBook I had recently published a book, The Power Glasses. Please have a look. Your feedback would be helpful. You can mail me for a free copy.

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fxp_sponsors Hiroki Kokubun

Users

more

The list of users are mostly published by Github or communicated directly. Feel free to contact if you find any information wrong.

Main Features

FXP logo
  • Validate XML data syntactically
  • Parse XML to JS Object
  • Build XML from JS Object
  • Compatible to node js packages, in browser, and in CLI (click try me button above for demo)
  • Faster than any other pure JS implementation.
  • It can handle big files (tested up to 100mb).
  • Controlled parsing using various options
  • XML Entities, HTML entities, and DOCTYPE entites are supported.
  • unpaired tags (Eg <br> in HTML), stop nodes (Eg <script> in HTML) are supported.
  • You can restore almost same XML from JSON
  • Supports comments
  • It can preserve Order of tags in JS object
  • You can control if a single tag should be parsed into array.
  • Supports parsing of PI (Processing Instruction) tags with XML declaration tags
  • And many more other features.

v5

I developed v5 in Apr 2023. And I didn't get the chance to complete all the features. I've ensured that new features don't impact performance. With v5, you have more control on parsing output. Check docs for syntax help and basic understanding.

Please leave a comment in discussion forum for your suggestions and if you really need v5.

How to use

To use as package dependency $ npm install fast-xml-parser or $ yarn add fast-xml-parser

To use as system command $ npm install fast-xml-parser -g

To use it on a webpage include it from a CDN

Example

As CLI command

$ fxparser some.xml

In a node js project

const { XMLParser, XMLBuilder, XMLValidator} = require("fast-xml-parser");

const parser = new XMLParser();
let jObj = parser.parse(XMLdata);

const builder = new XMLBuilder();
const xmlContent = builder.build(jObj);

In a HTML page

<script src="path/to/fxp.min.js"></script>
:
<script>
  const parser = new fxparser.XMLParser();
  parser.parse(xmlContent);
</script>

Bundle size

| Bundle Name | Size | | ------------------ | ---- | | fxbuilder.min.js | 6.5K | | fxparser.min.js | 20K | | fxp.min.js | 26K | | fxvalidator.min.js | 5.7K |

Documents

v3v4v5
documents
  1. Getting Started
  2. XML Parser
  3. XML Builder
  4. XML Validator
  5. Entities
  6. HTML Document Parsing
  7. PI Tag processing
  1. Getting Started
  2. Features
  3. Options
  4. Output Builders
  5. Value Parsers

note: version 5 is released with version 4 tfor experimental use. Based on it's demand, it'll be developed and the features can be different in final release.

Performance

negative means error

XML Parser

  • Y-axis: requests per second
  • X-axis: File size

XML Builder

* Y-axis: requests per second

Usage Trend

Usage Trend of fast-xml-parser

NPM Usage Trend of fast-xml-parser

Supporters

Contributors

This project exists thanks to all the people who contribute. [Contribute].

Backers

Thank you to all our backers! 🙏 [Become a backer]

License

  • MIT License

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