|Can I Use: Compatibility tables for support of HTML5, CSS3, SVG and other technologies in various browsers.|
A online es5, es6, react console. Run, save, transform your code.
An online editor that helps you create web applications, from prototype to deployment.
|Web Performance Checklist: Optimization' by Jon Yablonski.|
Developing APIs is hard.
Postman makes it easy.
Find out how well your site works across mobile and desktop devices.
|A free tool for testing websites. Enter the address of any website and Nibbler will give you a report scoring the website out of 10 for key areas, including accessibility, SEO, social media and technology.|
|And what if we got together a bunch of browser experts who work on large sites to create a definitive front-end performance guide?|
|FrontEnd Developer Handbook: This is a guide that anyone could use to learn about the practice of front-end development. From FrontEndMasters.|
|Website Grader is a free online tool that grades your site against key metrics like performance, mobile readiness, SEO, and ...|
|The power to design, build, and launch responsive websites visually, while writing clean, semantic code for you.|
|Real Favicon Generator:|
With so many platforms and icons, it's hard to know exactly what you should do. What are the dimensions of favicon.ico? How many Touch icons do I need? RealFaviconGenerator did the reseach and testing for you.
Discover who is
hosting any website.
Get information about the web host, IP address, name servers & more.
|Web technology information profiler tool. Find out what websites are Built With.|
Chrome & FF Extension.
|Wappalyzer is a cross-platform utility that uncovers the technologies used on websites. It detects content management systems, ecommerce platforms, web frameworks, server software, analytics tools and many more. |
Chrome & FF Extension.
|Get a quick aggregated view of everything the Web can promptly tell you about a site (domain), including its daily visitors, safety status, Alexa rank, owners and much more. Chrome & FF Extensions.|
|1 Click Screenshot:|
This extension is very simple. With just a few clicks, you can take a screenshot of an entire website and save it to a png file. There is no bloat or any fancy post-processing. The extension is open source. Chrome & FF Extensions.
|a powerful online tool for reducing drastically the size of your images and photos whilst maintaining a high quality with almost no difference before and after compression.|
|GTmetrix gives you insight on how well your site loads and provides actionable recommendations on how to optimize it.|
|Enter a URL (ex. sucuri.net) and the Sucuri SiteCheck scanner will check the website for known malware, blacklisting status, website errors, and out-of-date software.|
Send a Video, Not a Thousand Words.
A new kind of work communication tool that helps you get your message across through instantly shareable videos. Chrome Extension only, desktop app available.
30% of the websites in the world are powered by WP.
Your starting point for finding and sharing solutions with WordPress.org users around the world.
|Each month, over 50 million developers come to Stack Overflow to learn, share their knowledge, and build their careers.|
Join the world’s largest developer community.