Format reference
HTML Format Hub
HyperText Markup Language (.html) files define web page structure using nested tags for elements such as headings, paragraphs, links, images, forms, and scripts. As the backbone of the web, HTML drives browsers, templating engines, and static-site generators. Use sample .html files to validate parsing accuracy, DOM rendering, accessibility compliance, and scripting integration across engines.
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text/html
Related Formats in Code
HTML Related Formats
Format Strategy Links
HTML Format Guides
Best Format Guides
Conversion Guides
Implementation Notes
HTML Implementation Notes
Use the manifest endpoint for deterministic fixture selection in CI, then validate MIME/type detection against actual parser output.
If this format appears in multiple categories, prefer category-specific hub pages to keep test assumptions aligned with real usage.