Validate XML with VS Code

Question

I was a Mac user with BBEdit & Co. Now I'm on Windows with VS Code. I'm looking for an easy solution to validate XML with VS Code. Is there an extension for this?

Thanks!

Crosspurpose

you can validate you XML online too – Tittivate

I know. But it would be great to have it directly in the tool. By the way, which online validator would you recommend? – Crosspurpose

Answer 1

There is "XML" extension (known as "XML Language Support by Red Hat") that does not require Java.

Old answer:

For validating XML Schemas in VS Code there is a package called XML Language Support.

Sendal

downvote because this extension requires java, unlike XML Tools from Qub marketplace.visualstudio.com/items?itemName=qub.qub-xml-vscode – Nebulose

Unfortunately, now it is deprecated. Also agree with Devin that disadvantage is that it requires JDK or OpenJDK. – Tinytinya

Answer 2

I just wanted to know if my xml syntax was valid, and I didn't want to have to install and setup Java.

XML Tools from Qub worked great for me, I highly recommend it:
https://marketplace.visualstudio.com/items?itemName=qub.qub-xml-vscode

If you need to validate xml against a schema, some of the other more popular extensions might be better

Nebulose

How do you get it to actually tell you if your xml is valid? I don't see that option in the command palette? – Liquidator

try making it obviously invalid by deleting a < – Nebulose

@Liquidator There is an XML DOCUMNET in the left functional area which below the OUTLINE . If the xml file is invalid, it will show invalidDocument – Northington

@Northington I see the outline in the bottom left of vscode below the workspace, but no xml document. Do I need to put a definition of xmltools in settings? – Slow

If I make the xml invalid by removing a bracket: no remark by vscode. I can format it with the tool and I have evaluate xpath when pressing f1 – Slow

@Slow Firstly, you need to install XML Tools plugin, xml tree view is default enable. Secondly, open a XXX.xml file with VS Code. Finally, you will see the XML DOCUMNET – Northington

No entry in any menu to validate XML against a XSD schema. – Tumescent

Answer 3

For validation against a schema there is XML extension by Red Hat https://marketplace.visualstudio.com/items?itemName=redhat.vscode-xml this no longer requires Java since v0.15.0.

It supports a few ways of associating an *.xml with an *.xsd or *.dtd see the docs at https://github.com/redhat-developer/vscode-xml/blob/master/docs/Validation.md#validation-with-xsd-grammar

Most methods involve modifying the files or creating a catalog file but you can also associate files using settings.json.

XSD

"xml.fileAssociations": [
   {
       "pattern": "foo.xml",
       "systemId": "foo.xsd"
   }
]

DTD

"xml.fileAssociations": [
  {
      "pattern": "foo.xml",
      "systemId": "foo.dtd"
  }
]

File paths support wildcards and VS Code variables ${workspaceFolder}, ${fileDirname}, ${fileBasenameNoExtension}

Franklynfrankness

Doesn't work in corporate environnement. – Tumescent