opera browser[features]-web development

Web development

Standards support

We take pride in supporting all major Web standards currently in use, including CSS 2.1, XHTML 1.1, HTML 4.01, WML 2.0, ECMAScript, DOM 2 and SVG 1.1 basic.

Small-screen mode

When displaying a page in small-screen mode (Shift+F11) you can see how it will look on a mobile phone or other small-screen device running Opera.

Validate code

You can validate the HTML code of any Web page by pressing Ctrl+Alt+V.

Toggle graphics and style sheets

Graphics and style sheets can be toggled on/off via our toolbars and shortcuts.

Info panel

The Info panel shows details about the currently open page such as MIME type, page size, character encoding and more.

Reload from cache

Edit the source of any open Web page and view the result instantly. Go to Tools > Advanced.