VS Code

XML Desk

XPath, a tree, and format or minify, offline. No Java and no remote schema fetch.

Lite is free. Pro is $9, once, on Gumroad.

Tree

          order
  id    1042
  sku   A-18

XPath

          //order/id
1042

Designed scene. Not a screen capture.

XML Desk evaluates XPath 1.0 and 3.1 in VS Code, with namespace auto-detect, and can copy an XPath, show a tree, format, minify, and check that a document is well-formed. It is pure JavaScript: no Java runtime, no binary download, no remote DTD or XSD fetch, and no telemetry.

What you get

Lite includes XPath results, copy XPath, the tree, format, minify, and a well-formedness check.
Pro, sold on Gumroad, adds CSV or JSON export by XPath, a saved XPath library per workspace, offline XSD validation against local schemas only, and a canonical XML (C14N) diff.