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HTML validation
Accessibility validation
Checks for broken links
Spell checker with language detection
Validates local pages and intranets
Windows, macOS and Linux versions
Validates DOM generated source
CSS validation
Validates entire website
Validates multiple websites in one go
Validates specific parts of websites
Validates login protected websites
Works with forms
Select validations
by site, by page, by item
Validates behind authenticating proxy servers
Client certificate support
Saves misspelt words
Spell checks in other languages
Comprehensive spelling options
Comprehensive reporting options
Comprehensive link options
Cookie handling
Change user agent
Command line operation
Headless operation
Suppress results
Extended status
Extra results options

* Limited operation.

Please see the online manual for full details of the features available with each product and how best to use them.