Drop in an XML file, choose an enterprise sample, or paste your document. Parsing, XPath evaluation, and inspection run instantly in your browser with zero server round-trips.

WebAssembly Engine (Live Sandbox)

Initializing engine...

Add Your XML Document

Drag an XML, RSS, Atom, or SVG file here or click to browse

Maximum 10 MB · Read locally in your browser sandbox, never sent to any server

Review and edit XML source

XPath 1.0 Workbench & Namespaces

XPath 1.0 Expression

Namespace Bindings (Optional: prefix=URI, ...) Auto-detected from document declaration when available.

Layered Verification & Inspection Results

Root Node —

Total Nodes —

Execution Time —

Matched Nodes —

Input Size —

W3C XML 1.0 Well-Formedness	Evaluating...
Parser Memory Model	Generational Contiguous Arena (O(1))
Delimiter Scanner	SWAR SIMD 8-Byte Vectorized
W3C XPath 1.0 Engine	Full Specification Compliant

CLI Equivalent (Terminal & CI/CD)

oxml query "//book[price < 30]/title" input.xml

Evaluating...

Why Test Here?

Sub-Millisecond Execution:
- Powered by oxml-wasm 0.0.13, the core parsing engine allocates contiguous generational arenas with zero heap garbage-collection pauses. Queries typically execute in under 0.20 ms.
True XPath 1.0 Specification:
- Full axis support (child, parent, ancestor, descendant, following-sibling, attribute), relational comparisons, numeric predicates, standard functions (count, string, contains, starts-with), and union operators (path1 | path2).
Realistic Diagnostics & Error Feedback:
- Select an option from the "Introduce an error scenario..." menu to immediately see how the parser pinpoints syntax flaws, unclosed tags, and character encoding errors.

Architecture Guarantee

Zero Data Leaves Your Machine:
- Open DevTools → Network. The only requests are same-origin GETs for page assets and the 219 KB compiled WebAssembly binary. Your XML documents, payloads, and queries never leave your browser sandbox.
Pure Safe Rust (#![forbid(unsafe_code)]):
- Unlike legacy C libraries (libxml2, lxml) prone to memory corruption and CVEs, oxml is written in 100% safe Rust. No buffer overflows, no dangling pointers, no null dereferences.

WebAssembly XML & XPath Studio