Validating YAML Documents
Automatic Validation
Oxygen JSON Editor includes built-in validation engine for YAML documents to help you keep them well-formed. YAML documents are validated automatically as you type and the validation engine detects syntax errors (such as improper indentation or duplicate keys), based on the YAML specification. The built-in validation also works on files that consist of multiple YAML documents.
Manual Validation Actions
To manually validate the currently edited YAML document, use one of the following actions:
Validate- Available from the
Validation drop-down menu on the toolbar, the
menu, or from the Validate submenu when invoking the contextual
menu on one or more YAML documents in the Project view. The validation is done based on the YAML
specification. - Validate with
-
Available from the
Validation
drop-down menu on the toolbar or the
menu. This action opens a dialog box that allows you to specify a JSON Schema for
validating the current YAML document (it also works on files that consist of
multiple YAML documents). 
Check
Well-Formedness
()-
Available from the
Validation
drop-down menu on the toolbar, the
menu, or from the Validate submenu when invoking the
contextual menu in the Project view. This action checks the document for
syntax errors to make sure it is well-formed. - Validate with Schema
-
Available from the Validate submenu when invoking the contextual menu on one or more YAML documents in the Project view. This action opens a dialog box that allows you to specify a JSON Schema to be used for the validation.
Batch Validation
The built-in validation engine can also be used to batch validation
multiple YAML files at once by selecting multiple files in the Project
view, right-click, and select Validate > Check
Well-Formedness or Validate > Validate. This automatically validates the selected files using the built-in YAML
validation engine, based on the YAML specification.