A pure JavaScript library for validating, parsing, and building XML without C/C++ dependencies or callbacks.
Fast XML Parser is a pure JavaScript library for processing XML data. It allows developers to validate XML syntax, parse XML into JavaScript objects, and build XML from JavaScript objects, all without requiring any C/C++ native bindings. It solves the need for a fast, lightweight, and dependency-free XML toolchain in Node.js and browser environments.
JavaScript and Node.js developers who need to work with XML data in their applications, particularly those requiring high performance, no native dependencies, or compatibility across CommonJS, ESM, and browser contexts.
Developers choose Fast XML Parser for its superior speed compared to other pure JavaScript alternatives, its ability to handle large files, and its comprehensive feature set including entity support and order preservation, all without the overhead or installation complexities of native modules.
Validate XML, Parse XML and Build XML rapidly without C/C++ based libraries and no callback.
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Benchmarked as the fastest pure JavaScript XML parser, handling files up to 100MB without slowdowns, as evidenced by the performance charts in the README.
Written entirely in JavaScript with no native bindings, ensuring seamless use across Node.js, browsers, and bundlers without installation issues.
Supports XML/HTML/DOCTYPE entities, unpaired tags like <br>, stop nodes like <script>, and can preserve tag order—key for complex XML structures.
Offers separate parser, builder, and validator modules with tiny sizes (e.g., 20K for fxparser.min.js), allowing efficient, targeted imports.
The README explicitly warns users to join Discord for pre-release announcements to avoid breaking changes, indicating unstable releases that could disrupt projects.
Maintains separate documentation for v3, v4/v5, and experimental v6, creating confusion and requiring developers to match versions carefully.
Only handles syntactic validation; for business rule validation, it requires an external library (detailed-xml-validator), adding overhead and complexity.