|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.|
This SSL Checker will help you diagnose problems with your SSL certificate installation. You can verify the SSL certificate on your web server to make sure it is correctly installed, valid, trusted and doesn't give any errors to any of your users.
Are you pulling your hair out trying to find out why your secure page is not fully secure? Here's a simple tool that will tell you about any insecure items on your SSL page!
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.