w3c-validator

The w3c-validator.py script uses the curl(1) command to submit HTML files and URLs to the W3C Markup Validation Service and CSS files and URLs to the W3C CSS Validation Service. The script parses and reports the JSON results returned by validators.

Requirements

Python 3
Curl
An Internet connection

Usage

The script command syntax is:

python w3c-validator.py [--verbose] FILE|URL...

The optional --verbose option will print information about what is going on internally.
Names with a .css extension are treated as CSS, all other names are assumed to contain HTML.
Names starting with https:// are assumed to be publically accessible URLs, all other names are assumed to be local file names.
Any mix of one or more local files or HTTP URLs can be specified.
If one or more files fail validation then the exit status will be 1, if no errors occurs the exits status will be zero.

Examples:

$ python w3c-validator.py tests/data/something-html5-file.html
validating: tests/data/something-html5-file.html ...
error: line 822: The tt element is obsolete. Use CSS instead.

$ python w3c-validator.py https://www.methods.co.nz/asciidoc/layout1.css
validating: https://www.methods.co.nz/asciidoc/layout1.css ...

References

License

This work is licensed under the GNU GPLv3+