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Did you notice that the crazy race of updates and new releases between Chrome and Mozilla Firefox almost overshadowed any media news concerning Opera web browser. All mainstream media just ignore Opera preferring the news about Chrome and Firefox. That ain’t right, because Opera is a great web browser with impressive list of advantages. Today we would like to show you a list of Opera extensions for web developers and prove that Opera is just as good for web developers as the two bigger players. There is no doubt that Opera has many devoted fans among our readers and we assume that they will appreciate the following information concerning these web development plugins for Opera. Most of these extensions are small and narrow banded, but for example Developer Briefcase is a multifunctional extension with a set of various tools. Now let’s proceed with our today’s topic.

Readable JavaScript

This extension helps to format and colorize JavaScript code. This plugin is triggered by files with .js extension or by the toolbar button. Also it has some useful features for debugging and parsing Java scripts.

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JsonViewer

Json Viewer formats and highlights JSON data loaded from file or server. Also it helps you to process data by highlighting string and boolean values with blue, numbers – with green, null values – with red color.

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The Developer Briefcase

The Developer Briefcase contains a set of useful tools that would help web developers in testing, debugging and analyzing web pages. It is hard to find a similar tool with such extensive variety of features.

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Resize Me

You can easily resize any page in a browser by using Resize Me. It is useful for testing on various screen sizes. You must know that window sizes bigger than your screen resolution will appear as new tabbed pages.

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YSlow

YSlow as you may have guessed from its name analyzes web site performance. Therefore, you can optimize your website speed results by using report created by this small but awesome extension.

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URL Encoder/Decoder

The following plugin allows to use such decoding/encoding methods as encode/decode URI, encode/decode URI component, escape/unescape.

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Validator

Validate your web pages with the W3C’s HTML Validator. This extension validates only online pages and all you have to do is just click a button on the panel.

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OMeasure!

According to the official information on the extension’s page this is a simple measuring plugin for web developers and designers. Don’t forget to reload page you want to measure just after the installation.

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XCodeViewer

XCode Viewer is a XML-viewer that supports syntax highlight, XPath search. Also you can expand/collapse tags and move nodes by pressing the Tab key.

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Auto-Ipsum

This is a very useful tool for web designers because every webpage you view will be checked for special HTML comments that specify numbers or ranges of words, sentences, or paragraphs. While you’re viewing a page with these special comments, those comments will be replaced with as much Lorem Ipsum text as the comment calls for.

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