HTML5 is an internet markup language used for structuring and presenting content on the Web. In 2014, the World Wide Web Consortium (W3C) formally sanctioned revision 5 of the Hyper Text Markup Language (HTML) standard, its core aim to improve the language with support for the latest multimedia while keeping it easily readable by humans and consistently understood by computers and devices (web browsers, parsers, etc.). Ads created in HTML5 offer the benefit of working across devices and platforms.

Benefits of Using HTML5 Include:

  • Based on a well-established programming language that many authoring tools and developers can produce.
  • Allows for rapid testing infrastructure that all browsers and devices should be able to process.
  • Can be served into standard iFrame or Safeframe.
  • Preserves HTML standard methods of layering content such as positioning, layering, and opacity.
  • Responsive ad design (when required, specific sizes can be defined in the ad code using standard methods).


Maximum file size: 200KB (per creative package)

Ads not to exceed 15 file requests during initial file load and host-initiated sub-load.

All page requests will be via HTTPS. Any ad or creative making requests for tracking pixels, impression tracking, creative assets, or data must default to HTTPS (SSL).
Analytics data such as in-view time or viewable impression are not supported for HTML5 creatives.

Ad Specs - Reach PLC © 2021