Opera Mini™ Developer Resources

Opera Mini request headers

Opera Mini 4 uses various custom HTTP headers, in addition to the standard ones — this article tells you what they are, and what you can do with them.

Differences between Opera Mini 3 and 4

This article explains the main differences between Opera Mini 4 and the previous version (3.x) in terms of standards support, etc.

Safe Media queries

With mobile and desktop browsers having such varying support for media queries, using them effectively across browsers/platforms can be difficult; here we explore a solution to this issue.

How to serve the right content to mobile browsers

This article looks at the different methods available to you for serving appropriate content to mobile devices, along with caveats to watch out for.

Designing and Developing mobile web sites in the real world, part 1

This two-part article series presents two real case studies, exploring the issues faced, and how they were overcome. Other topics include standards support, identifying mobile users, and server-sniffing.

Designing and Developing mobile web sites in the real world, part 2

Part 2 of the article described above

Evolving the Internet on your phone

This article covers Opera Mini 4's standards support in greater detail, and gives some useful design tips.