This can be crucial when debugging CSS layout issues. This extension changes the CSS of all your elements so you can very visually see where are each element boundaries. While itвЂ™s not widely used, and has a relatively low rating, it has been greatly recommended on twitter in the past. PesticideДisclaimer: This is a toolВ I donвЂ™t regularly use. ItвЂ™s a super interesting tool to have handy. But additionally comes with handy toolsВ such as a palette browser and gradient generator. Similarly to What Font, the ColorZilla extension allows you to get the color of any pixel on the website. Fonts can make a huge difference when it comes to the design of your site, and you can use this tool to make sure theyвЂ™re all as they should be, or perhaps to even get information about a font a particular website is using so you can also use it on yours. This extension allows you to easily inspect which fonts and font properties that are being applied to any text on a website. I personally donвЂ™t use the extension anymore but it has been very useful in the past when I was still very unfamiliar with many of the HTML & CSS ways.

This extension adds a toolbar to your browser with options for many useful web development functions such us activating/de-activating scripts, popups, functions to control cookies or to look up for methods to build forms, images, styles, etc. Web DeveloperДonвЂ™t let appearances fool you, this may not be the most beautiful toolbar ever but itвЂ™s certainly powerful.

This extension is more than a CMS detector or framework detector: it uncovers more than a thousand technologies in dozens of categories such as programming languages, analytics, marketing tools, payment processors, CRM, CDN, and others. WappalyzerДid you ever wonder which technologies are being used by a particular site? Wonder no more with Wappalyzer. The extension comes with a predefined set of options, but you can modify them to fit your needs, this last option makes it better than simply using the Chrome Developer Tools. ItвЂ™s simple but extremely useful if you need to validate your website among different resolutions and viewports. It allows you to change the size of your screen. This simple yet effective extension does exactly what the name suggests.

Chrome addons for developers