CIUM provides compatibility tables for features in HTML5, CSS3, JS API, SVG and other upcoming web technologies.

A smart tool for web designers and web developers.

  • Categorized and searchable list of
    useful web technology features.
  • Indicates whether vendor prefixes are needed
    or a polyfill is available.
  • Includes browser and usage stats.
  • Free download for iPhone & iPad.
    Requires iOS 7.0 or later.

Which browser version will support the selected feature? Is a vendor-prefix needed? CIUM shows you at one glance.

Check feature support over all published versions in details view.

Get informed about the global distribution and market share in the browser stats.

Which modern web technology operates on what browser?

CIUM delivers compatibility lists for all major features based on data provided by and

CIUM is a free universal app for iPhone and iPad.

The CIUM database is updated regularly. Determine if you get your updates pushed on your device.

Further information coming soon.