HTMLHint is an HTML linter and static analysis tool designed to identify structural errors and syntax violations in source code. It functions as a configurable validator that scans local files and remote URLs to detect malformed tags, duplicate IDs, and document structure inconsistencies.
The tool serves as an accessibility auditor, verifying that web elements include necessary labels and alternative text for images. It further distinguishes itself by enforcing web document compliance, checking for the presence of doctypes, language attributes, and head metadata.
The project covers a broad range of quality assurance capabilities, including tag integrity verification, attribute standardization, and the restriction of inline styles. It also analyzes document formatting to detect mixed indentation and unescaped special characters.
Users can define and toggle specific syntax checks using configuration files, command line flags, or inline markers.