Why Open the Web?

Despite the connecting purpose of the Web, it is not entirely open to all of its users. When used correctly, Web pages and applications can be displayed almost anywhere. However, many people are excluded from accessing Web content, due to their choice of browser, device or operating system.

If you are a Web developer and would like help in making your site Opera compatible, feel free to contact us using the e-mail addresses in the side bar, or report an issue using the Opera Bug Tracking System Wizard. If you report an issue via the wizard (which is generally the preferred approach, unless you have a specific question rather than a bug), mention you are the developer in the report, along with a valid e-mail address, so that we can contact you with any solution we may find.

Web standards

The World Wide Web Consortium (W3C) makes recommendations on how to publish Web content. Using open Web standards–rather than single vendor solutions–makes it more likely that your site will reach its maximum possible audience and revenue potential, by allowing any browser on any device to be able to access your site. Open standards from the W3C are free for browser vendors and tool developers to implement, and have a well defined patent policy, which promotes a level playing field and increased interoperability.

Opera's standard support

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Forwards compatibility

Developing to standards and testing across browsers will help ensure forwards compatibility, by avoiding the trap of being locked into one browser, or your site breaking when a browser fixes a bug your site relied on. Many sites that designed specifically for IE6 have had to go through costly repairs once IE 7 and IE 8 have been released.

Using Opera and other standards compliant browsers during the development and testing phase will help save you money in the long run, by avoiding these costly mistakes. Developing with Opera in mind will also helps ensure that your site is usable on mobile and other devices as the same Opera Presto rendering engine is used across all Opera-based browsers. Mobile browsing is one of the fastest growing areas of the Web, and Opera is playing a market leading roll in this growth industry.

Develop for mobiles


Opera is at the forefront of Internet security and supports the latest security protocols, including 256-bit SSL version 3 and TLS 1.2, and EV certificates. Opera also supports open, international standards, such as those recommended by the World Wide Web Consortium (W3C).

Security in Opera


Opera actively works to increase the accessibility and usability of the Web via its browsers regardless of user ability. Features such as Opera Zoom, a much imitated Opera original feature, keyboard shortcuts, spatial navigation and mouse gestures help speed up navigation and searching regardless of whether you use a mouse, can see, have limited mobility or learning difficulties. Opera also makes it easy to apply alternative style sheets and to customize the browser to make Web pages more accessible. Opera supports Voice Over screen reader on Mac OS X, and has WAI-ARIA support.

Opera and accessibility

Develop in Opera

Write your pages in standards-compliant code, check it in Opera, and your site will be more likely to work in all major browsers. Download Opera for free, with the included Opera Dragonfly developer tool, to start testing and debugging your site.


Mistaken identity

Web sites can often break in Opera due to sending Opera the wrong code, sending work-arounds for long since fixed bugs which now break the browser, or outright blocking.

How to correctly check for Opera

Open the Web

Develop in Opera

Browser JavaScript

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