XML tools
Run the included FLWOR example, or use Ctrl/Cmd+Enter after editing the XML, query or variables.
XML and query run inside this browser. No document is sent to a server.
Use up to 32 simple names with string, number or boolean values; declare each as external in the query.
XQuery 3.1 subset. One XML document; no doc(), modules or updates. 3-second execution limit.
Result is out of date. Run again before copying or downloading.
Use this XQuery tester when an XML query needs more than selecting nodes: filter books, sort them, then construct a new element for each match. The result comes from an actual XQuery 3.1 engine.
A small XQuery editor is useful for reproducing a query before it reaches a database. Run XQuery online here with one pasted document; this page does not pretend to provide BaseX collections or remote files.
See an actual query result with deliberate limits.
This XQuery tester runs for, where, order by and return over a pasted XML tree. The default query selects two books, sorts them by price and creates result elements; XPath 1.0 alone cannot express that program.
Execution stays in a terminable worker with a single supplied document. If a query asks for doc(), a collection or a module, it fails rather than reaching a URL or silently returning unrelated data.
The included query filters and sorts books, then builds new result elements. Switch the example selector to try an external variable, a declared namespace or a deliberate syntax error.
Put a JSON scalar under a simple name and add declare variable $minimum external; in XQuery. The variable example starts with 20 and returns only the matching title.
Execution is manual because a short query can still create a large sequence. Ctrl/Cmd+Enter runs it; editing XML, XQuery or variables immediately disables export until the next complete result.
For, where, order by and return let an XML query filter and reorder nodes, then create new XML. The output keeps sequence order and displays constructed nodes as text, never live HTML.
JSON variables feed declared external XQuery variables without splicing values into program text. Change a threshold to test the same query with different input.
Malformed XML, an undeclared variable and invalid syntax fail separately. A valid empty sequence reports zero items, while a successful full result can be copied or downloaded.
Paste the file's XML text into the XML field and run the query against that one document. File paths, URLs and collections are not loaded. This XQuery tester is for a reproducible single-document case.
Declare it in the query, for example declare variable $minimum external;, then enter {"minimum":20} in Variables. The engine binds the number as a value rather than inserting it into query source.
Declare a prefix for the namespace URI in the query and use that prefix in the path. The Namespace example includes XML with a default namespace and a matching b prefix declaration.
Return an element constructor such as <result>{$book/title/text()}</result>. Returned nodes are serialized as XML text. This page does not add a declaration or render them as browser HTML.
XPath selects and computes values in a document. XQuery adds a complete query language with variables, FLWOR clauses and constructors. Use the XPath tester for a path expression and this XQuery tester when the result must be reshaped.
Have a query that behaves differently?
Keep the XML sample beside its query when reporting a failure. This XQuery tester keeps the error and the last complete result distinct, so another run never looks successful by accident.