xmllint. Easy validation of XML. XML Schemas and DTDs supported. Zero dependencies.
- Validate schemaless XML file 👉
function validateXML(input: string | Buffer): Promise<void>
- Validate with DTDs 👉
function validateXMLWithDTD(input: string | Buffer): Promise<void>
- Validate with XML Schemas (XSD) 👉
function validateXMLWithXSD(input: string | Buffer, xsdfile: string | Buffer): Promise<void>
- Written in TypeScript
- Tests with good coverage included
- Zero NPM dependencies
- Availability of
xmllintis verified during installation time
- No network connections used during validations
constvalidateXMLvalidateXMLWithDTDvalidateXMLWithXSD} = ;
Demos of passing validations
All the examples below return promises which will eventually resolve.
;;/*** All referenced DTD's must be available locally as `xmllint`* is invoked with `--nonet` which prevents network connections**/;/*** Path to XSD Schema file must be provided with the document**/;
Demos of failing validations
All the examples below return promises which will eventually reject with the output from
See more demos within the tests.
How to install
You might already have it. Execute
xmllint --version and see what it prints out.
On Debian distros look up
libxml2-utils, on RedHat
libxml2. A recent version of
xmllint should be bundled by default on MacOS.
This pacakge runs a postinstall script to verify that you have
How to see the actual errors in my XML?
The promise is rejected with the error output from
xmllint. The error contains all the available details. Expect to see something like this:
Error: xmllint exited with code 3 when executed with xmllint --schema /Users/aautio/foobar/validate-with-xmllint/test/xsds/valid-xsd.xsd --noout --nonet -: -:2: element root: Schemas validity error : Element 'root': Missing child element(s). Expected is ( body ). - fails to validate