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

• Validate XML data syntactically. Use detailed-xml-validator to verify business rules.
• Parse XML to JS Objects and vice versa
• Common JS, ESM, and browser compatible
• Faster than any other pure JS implementation.

It can handle big files (tested up to 100mb). XML Entities, HTML entities, and DOCTYPE entites are supported. Unpaired tags (Eg <br> in HTML), stop nodes (Eg <script> in HTML) are supported. It can also preserve Order of tags in JS object

IMPORTANT: It is recommended to use fast-xml-validator instead of inbuilt validator.

• Flexible-XML-Parser is 1.25 times faster than this library when not preserving order of tags. Takes less memory when processing big files. Supports incomplete XML/HTML. And output is highly customizable. Build whatever you want. So if you're fine with some extra configuration then try it out.
• @nodable/sax is a SAX parser based on Flexible-XML-Parser. 3-4 times faster than sax and support all features of base package like incomplete input, streams, skipping certain tags from processing etc.
• fast-xml-validator is separated from this package. Has many features. Faster. You can exvlude particular tag from validation. And much more.
• fast-xml-builder is a XML to JS Object builder used in this package in past. Now, it supports more features, and faster. So, recommend to use it directly.

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more

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

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

note:

• Version 6 is released with version 4 for experimental use. Based on its demand, it'll be developed and the features can be different in final release.
• Version 5 has the same functionalities as version 4.

negative means error

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

Usage Trend of fast-xml-parser

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

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

• MIT License