How mobile testing is done?

Types of mobile application testing. Functional testing ensures that the application is working as per the requirements. Most of the tests conducted for this is driven by the user interface and call flow. Laboratory testing, usually carried out by network carriers, is done by simulating the complete wireless network.

Which tool is used for mobile testing?

Appium is considerably one of the best mobile app testing tools used by most professional testers. Appium is an effective tool for web and mobile app testing that works well even for hybrid applications.

Is QA testing a good job?

With its fast-growing number of resources and demand in the industry, quality assurance is becoming an attractive career path for many. While some companies include only a few specialists and some have a dedicated team dealing with quality control, it’s safe to say that the need for this field is on the rise.2020-06-16

What is used for mobile testing?

Appium is a popular open-source framework used for automated mobile app testing. It allows developers to automate testing of native or hybrid iOS and Android applications. Appium doesn’t work alone. It runs the test cases using the WebDriver interface.2021-10-15

Is testing harder than development?

Being outnumbered naturally means that testing has less of a voice. That doesn’t need to be a problem though, we just need to shout twice as loud. So there you have it, its official, testing is harder than development!2016-10-27

What type of testing is done for mobile app?

The common types of performance tests include load testing, volume testing, soak testing, spike testing, and stress testing. Security is one of the prominent concerns of almost every mobile app owner in the present times. Reportedly, 80 percent of users are more likely to uninstall an app due to security issues.

Is testing easy to learn?

Testing tools are easy to learn : Tools are relatively easy to learn and once you get hands-on, you are ready to use it for any application. There are many online courses as well, that teach you Testing Tools like UFT, Selenium which is in demand nowadays.2019-04-23

What does mobile application testing include?

Mobile application testing is the process through which applications are tested for required quality, functionality, compatibility, usability, performance and other characteristics.

Is software testing difficult?

This difficult, time-consuming process requires technical sophistication and proper planning. Testers must not only have good development skills—testing often requires a great deal of coding—but also be knowl- edgeable in formal languages, graph theory, and algorithms.

Is testing job difficult?

Discipline. QA testing can be a very repetitive process, so it’s easy to lose focus after analyzing and reporting for long periods of time. Since so much of the job can seem repetitive, QA testers have to possess a sense of discipline to get through the job.

What does a mobile application consist of?

What Does Mobile Application (Mobile App) Mean? A mobile application, most commonly referred to as an app, is a type of application software designed to run on a mobile device, such as a smartphone or tablet computer. Mobile applications frequently serve to provide users with similar services to those accessed on PCs.2020-08-07

Is testing a boring job?

Testing is not a boring job at all. Actually, it can stress you to your limitations. As quoted by Michael Bolton, “Testing is a continuous learning process by exploring, discovering and investigating the information you have”.

Is manual testing easy to learn?

Manual testing requires a lot of effort and determination, but keep in mind that it isn’t sufficient for one’s development as a professional. Additional skills and tools will need to be mastered during the game (automatic testing and basic programming skills are but a few), so an open mind will get you through it.

Is mobile testing hard?

So, mobile testing is not tough because testers have to think about vast coverage and real-time usage (yes, they are surely the differentiating factors from any typical testing) but mobile testing has become tough because while running a race with allowed time to do testing, most of the mobile testers prefer to do

How do you perform mobile testing?

You can perform mobile application manual testing using emulators or simulators and by choosing the desired device. You can also perform mobile application manual testing using real device cloud or setting up a device lab within your organization.2021-11-24

Is testing job stressful?

Software testing can be stressful. Causes can vary from deadlines, lack of communication, or internal pressure. It is also the relentless nature of the job. As much as we love our job, here are some of the struggles that only a tester will understand.2015-04-14

What do they do in mobile testing?

Mobile device testing is the process by which mobile apps are tested for functionality, usability, and consistency. Testing app on mobile devices can be done manually or with automation.2020-05-14

What is automation testing in mobile?

During mobile automation testing, both the hardware and software go through testing processes that require little or no human intervention. The hardware part is tested by connecting the mobile device to an automation testing system via a cord or remotely accessing an automation testing module.2020-10-11

Is QA testing a hard job?

The work of a QA specialist involves; verifying product requirements, performing risk assessments, improving the quality of the product, testing, planning, and analyzing test results. It’s not too demanding or challenging, though. Unlike other office jobs that are often exhausting and can lead to professional burnout.2020-08-01

How to Perform Mobile Web Testing | BrowserStack

Launch Chrome and navigate to the website to be tested on mobile. Open the Developer Tools available in Settings -> More Tools -> Developer Tools. macOS users can use the shortcut fn + f12. Windows users can use Control + Shift + J. Select the Device Toggle Bar. Select the device to be emulated from the available list of Android and iOS devices.

5 Excellent Ways For Mobile Website Testing

Software emulators are still one of the simplest ways to test the mobile view of the website. Emulators allow you to run the same software and applications of the original device without altering them, as well as it shows the difference between duplicate systems.

Test Your Website on All Mobile Devices Using These 10

BrowserStack is yet another popular online tool to test your website on various mobile devices. It is quite a robust and exhaustive tool that provides you with easy access to more than 1,200 real

How to Inspect Websites on Mobile Devices – Medium

Open Chrome browser and navigate to chrome://inspect. Open Inspect from Chrome 2. Under Remote Target, the sites you opened in your mobile browser will be listed. You can click inspect to debug the

Website Speed Test and Website Analysis – Free test

Responsive (RWD) site test A responsive (RWD) website is not enough to ensure that it is efficient and fast to display. Dareboost offers you all the settings (choosing bandwidth, device, etc) necessary to test your site performance, and provides you best practices for your RWD or dedicated mobile page. Detailed mobile website speed test report

MobileTest – Test your mobile sites and web applications

Google Mobile-Friendly Test Tool — Test how easily a visitor can use your page on a mobile device. Just enter a page URL to see how your page scores. Compare your mobile site speed — See how your mobile site speed ranks compared to other top brands and learn how you can provide a faster, more frictionless mobile experience.

Page-oscope: Preview Websites on Various Phones

Try the MobileMoxie Page-oscope without logging in You can use it for free 3 times per day. Learn how to use the MobileMoxie Page-oscope to Check Mobile Landing Pages for SEO & PPC TEST MOBILE LANDING PAGES ON MORE THAN 50 IOS & ANDROID DEVICES Emulate your mobile landing pages in real time across all our mobile devices.

Test your website for responsive design

A free tool for developers to check how their website appears on the most popular devices. Test your website for responsive design A free tool for developers to check how their website With our tool you can see how your web page looks on some of the most famous mobile devices.

mobiReady

Is your site mobile ready? Test it for free. GO Sign upto mobiReadyand benefit from these additional features Free Analysis & Reports Receive in-depth analysis & recommendations straight into your inbox to share with your team. Store & Compare Test Results

How to View Mobile Version of Website: In Just 3 Clicks

To begin, right-click on the frontend of your website and choose Inspect from the menu: This launches developer tools and reveals a module on the right with coding elements from that page. You don’t have to worry about the coding, since the primary goal is to switch to view the mobile version of the website.

Test Your Website at Different Mobile Screen Resolutions

About us. Responsive Checker provides you the service to test your website for different mobile phones and tablets at one single platform including devices from Apple, Sony, Samsung and LG.

MobileTest.me – Test your mobile sites and responsive web

MobileTest.me – Test your mobile sites and responsive web designs Test your websites in smartphone & tablet emulators Select a device to start Apple iPhone 5 HTC ONE Nokia Lumia 920 Samsung Galaxy Y Google Nexus 7 Apple iPad Mini What people say about MobileTest.me Charmon Stiles. Marketer, Tech geek, Artist.

Test Android App & Website on Real Android Devices

Users need to follow these simple steps to test an android app on a real device: Sign up on BrowserStack App-Live for a free trial. Upload your App through Playstore or directly upload your APK file from your system. Choose the desired Android real device and get started! Products to help deliver unmatched accuracy TEST YOUR WEBSITES LIVE

Mobile-Friendly Test – Google Search Console

Test how easily a visitor can use your page on a mobile device. Just enter a page URL to see how your page scores. More usage tips Why mobile? The web is being accessed more and more on mobile devices. Designing your websites to be mobile friendly ensures that your pages perform well on all devices.

Mobile Emulator – Test Your Website On Mobile – brick&mobile

Using our mobile emulator tests how your website is displayed on a mobile device. Of course, this is a simulation only, and the best way is to try it yourself on a real iPhone, Android, BlackBerry or over 5000+ phone models worldwide. Our mobile emulator tests how your website displayed across different smartphones.

Mobile-Friendly Test Tool – Search Console Help

Search Console’s Mobile-Friendly Test Tool is a quick, easy way to test whether a page on your site is mobile-friendly. Open the Mobile-Friendly Test Tool Using the tool The Mobile-Friendly test

How to Test a Mobile Application [Step by Step] | Testbytes

Hence Simulators are preferred to test mobile application whereas Emulators are better for the mobile web application testing. Cloud-based testing of the mobile application. Allowing run mobile devices to run on several systems and networks, cloud-based testing helps to get over the drawbacks of simulators and real devices.

How to View the Mobile Version of a Website on Your

SimilarWeb analyzed 2 trillion site visits in 2017 and found that 63% of U.S. site visits were from a mobile device – that’s more than half of all site traffic across the country. Companies can no longer lean on a mobile-friendly site, they need a mobile first strategy.

How to test a website – EasyQA

Here are some tips to test your website on mobile: Verify the compatibility with smartphones and tablets Ensure the site navigation is as simple as possible Optimize the loading time of your site Ensure buttons are large enough for people with big finger Optimize all images size Don’t use Flash and pop-ups

Responsinator

The Responsinator is designed to test responsive websites on different device resolutions

Mobile Friendly Test – A Tool to Check Mobile Site Test

Mobile Friendly Test – A Tool to Check Mobile Site Test Smallseotools offers a free online to check responsiveness of a webpage or website. Enter url in mobile friendly test tool and check if a site mobile ready or not. Smallseotools offers a free online to check responsiveness of a webpage or website.

Free Mobile Website Speed Test – Uptrends

Free Mobile Website Speed Test The most advanced online mobile website speed test When you plug in your URL, choose a device type, and a checkpoint location, Uptrends opens a fresh Chrome browser and loads your page. The checkpoint simulates the screen size and connection speed based on your tool settings.

How to test the responsiveness of website [ The complete

Use Google Chrome to check website responsive. Steps to check your website’s responsive design with Google Chrome: 1. Open the site you want to test in the Google Chrome tab. For example, we will use the WishDesk agency site. 2. Right-click on the landing page of the website to open the menu. 3. After the menu opens, click “Inspect”. 4.

Check Mobile View of Website using LT Browser | LambdaTest

Download and install LT Browser to enjoy un-interrupted mobile website testing for FREE!! Build Mobile View Website Faster Then Ever Custom Mobile View Build your own custom Mobile Viewport. View your website in Mobile Viewports and see how it looks on all devices. Side-by-Side Mobile View No need to go back and forth between two screens.

Mobile simulator – responsive testing tool – Chrome Web Store

Smartphones and tablets simulator on computer very realistic with several models and resolutions to test your mobile site. 16 models of Android smartphones : – Samsung Galaxy S20 (CSS resolution 360px) – Huawei P30 PRO (CSS resolution 360px) – Google Pixel 5 (CSS resolution 393px) – Oneplus Nord 2 (CSS resolution 412px) – Samsung Galaxy Z Flip3 (CSS resolution 360px) – OPPO Find X3 PRO

Website Speed Test – Website & Page Performance Checker ᐈ

Test your mobile website speed. Keep in mind that most users will view your resource from mobile devices. That’s why our tool provides an opportunity to test the platform rate from different devices. Use fast-loading page formats so that users get information from your pages even faster.

Compare your mobile site speed – Think with Google

See how your mobile site speed ranks compared to other top brands and learn how you can provide a faster, more frictionless mobile experience

Page-oscope: Preview Websites on Various Phones

TEST MOBILE LANDING PAGES ON MORE THAN 50 IOS & ANDROID DEVICES. Emulate your mobile landing pages in real time across all our mobile devices. This is great for catching problems caused by serving Responsive Design, mobile-friendly pages on different screen sizes. Easily change between devices speeding up the time it takes to validate your site

Mobile Testing Types, Techniques, Strategies To Test

Mobile web testing is performed to test applications that are run or can be accessed through a mobile browser. Web apps for mobile are comparatively easier to build and test as compared to mobile apps but are much more primitive in terms of functionality.

testing – How to test web-apps on mobile for free without

How to test web-apps on mobile for free without wlan? Ask Question Asked 13 years, 7 months ago. Modified 11 years, 3 months ago. Viewed 359 times 0 I tried GNUBOX which use bluetooth to connect to my computer then to the internet. It’s very painful to set up (under windows more than under linux, but it’s still painful, it works 1 time on 3).

How to Test a Website on Different Browsers – Practical

Perfecto Mobile Handset Test. Perfecto Mobile is a testing service that allows merchants to test a website for mobile compatibility across hundreds of real mobile devices. Merchants can also test across geographical locations, including the United States, United Kingdom, Canada, France and Israel.

How To Make Your Website Mobile-Friendly in 2022 | 9 Steps

The best way to find out how mobile-friendly your mobile site is is to test it! You’ll want to do this in three different ways: Run URLs through Google’s mobile-friendly tool. Google has a free mobile-friendly testing tool, which anyone can use to test how mobile friendly any given URL is

How Do I Know If My Website Is Mobile Friendly? – Forbes

The 30-second method. Google offers a website where you can test your website to see if Google says it is mobile friendly. Simply paste the URL of your website into the space as shown below, then

How to Optimize Your Website for Mobile Users?

#1: Designing with mobile in mind. The web is built largely on the principle of serving desktop users. The real web, the real advancements in technologies, is best displayed on a beautiful full-screen display. But, smartphones and other mobile devices are a thing, and it’s time to start adapting to the concept of mobile-first design.

How To Redirect Mobile Users On Your Website – WooRank

Mobile Websites. While it’s becoming more and more uncommon, some businesses still prefer to have a separate website for mobile users. This comes with lots of potential problems that can easily be avoided. Check to make sure your website is mobile friendly. You can check your website has been correctly setup for mobile by running a Free WooRank

How to Optimize Your Site for Mobile: A Complete Guide

Test Your Site Using Google’s Mobile-Friendly Tool Before you take any further action, it’s a smart move to see how your site is already faring when it comes to mobile-friendliness. Doing this will help you hone in on the specific areas of your site that need work, and give you useful information on how you can make improvements.

How to Test a Mobile Web App in Cypress – Automated Visual

You cannot test native mobile apps with Cypress, but you can get pretty close with mobile web apps. Combining these three methods will help you narrowing the gap between desktop and mobile testing. To understand what makes an app behave differently, it is nice to look into your app as a developer at least for a little while.

6+ Best Responsive Test Tool to Test Website Online

The online mobile browser emulator plays a major role while testing your website responsiveness. If you don’t have any smartphone, but you want to check your site, then you can use online responsive tool to test the site.. There is no doubt that the percentage of all users that comes from different smartphones and mobile devices is Growing.

How to test mobile application: strategy, tutorial and tools

So, it is better to use mobile simulators to test mobile application. Emulators are more appropriate for the mobile site testing. Here, you can read more about emulators and simulators. Some advantages of using the simulators to test mobile application: Easy setup. Fast working. Helps to verify and explore the behavior of your mobile app. Cost

Get paid to test websites | Userpeek.com

However, there are some requirements that you have to meet to be able to test websites and get paid: A PC or Mac, a stable internet connection, and a proper microphone. You’ll need an iPhone, iPad, Android phone or Android tablet if you’d like to take mobile tests.

How To Make A Website Mobile Friendly | HostGator

You want your visitors to be able to interact with your website in the way that makes the most sense for them. 12. Regularly Perform Mobile Testing. The best thing you can do to make sure your website offers a good mobile experience is to regularly test it out yourself on your mobile device.

Mobile Friendly Test Tool | Mobile Checker for a

Mobile-friendliness is a crucial factor in determining your online success. So it is important to ensure that your website passes the mobile friendly test. However, if your website scored low on google mobile friendly test, it is important that you focus on Mobile friendly Google SEO practices.

Mobile App Testing Tutorials (A Complete Guide with 30

The Complete List of 30+ Mobile Testing Tutorials. A complete mobile app testing free online course. This 1st tutorial will be both an introduction and your guide to Mobile Testing and tools. Read an understand the complete Mobile Application Testing Strategy and test cases.

3 Free Responsive Testing Tools To Test Website Responsiveness

3 Free Responsive Web-design testing tools: 1. Responsinator: Save. This is the first tool which you should use to check the responsiveness of your site. It will show you how your site will look in different Apple devices ( iPhone 5, iPhone 6, iPad) and along with that you can also see how your website will look into an Android phone of various

How To Make Your Website Mobile Friendly? (2022 Guide)

If you don’t have a Google Search Console account, you can also check your site’s mobile optimization using Google’s Mobile-Friendly Test. Enter your site’s URL, hit Analyze, and wait till the tool collects all the data. The only drawback is that you can analyze only one URL at a time. So if you need to audit the entire website, it’s

How to use the mobile browser emulator in Chrome, Firefox

Access Developer Tools in Google Chrome. Click or tap on the “Toggle device toolbar” button (it looks like a smartphone next to a tablet) or press CTRL + Shift + M on your keyboard. This activates the device toolbar where the mobile page is loaded. By default, the device toolbar uses a Responsive template for the site you loaded. Click on it and choose the mobile device that you want to

5 Tools To Test If Your Website Is Really Mobile Friendly

This test actually will tell you more about how Googlebot will see your page rather than how your mobile users might see it. That itself is very helpful because you can use their feedback for SEO purposes as well. If your website passes the test, you will see a green message that says Awesome! This page is mobile-friendly..

DIY: Test your mobile site! – Yoast

If you want to check if your mobile site works at all, use the Inspect tool in your browser and Google’s mobile-friendly test. Check for a number of specifics if your website is fit for mobile devices, like top tasks and the size of your buttons.

How to Use Mobile Emulation Mode in Chrome – SitePoint

Website testing has become increasingly complex. The days of checking functionality in a couple of browsers are long gone. Your latest masterpiece must be rigorously evaluated on a range of mobile

Optimizing Your WordPress Site To Be Mobile-Friendly – A

Open up your browser, go to Google Mobile Friendly Test and enter your website’s URL, then click Analyze. After a brief analysis, it will tell you if your website is mobile-friendly or not. If your website is mobile-friendly you will get a green message telling you so. In case it’s not, the test will tell you your website is not mobile

How to Develop and Test a Mobile-First Design in 2021

Mobile-first design is not a complex task but a series of small development changes that can help your website render perfectly on the mobile with a happy user. To develop a mobile-first design website, we need to absorb some habits and remember a few tips to test the application efficiently. How To Develop a Mobile-First Design

How to Properly Run a Website Speed Test ⚡️ – Kinsta

Google Mobile website speed test tool. You can get reports sent right to your email, or forward the information along to your webmaster or developer. However, remember that a 100/100 score might not even be possible in all scenarios, depending on how your WordPress site is set up. With a lot of multipurpose themes and sites with dozens of

Responsive Website Design Tester | Media Genesis

Responsive Design Checker was initially created in 2012 as an exercise for Media Genesis developers to see if they could create a tool that could be used to test websites for mobile design. Essentially, developers wanted to see how well certain websites could adapt when viewed on mobile device (like a phone) rather than just on a computer desktop.

How to View the Mobile Version of WordPress Sites from Desktop

More than 50% of your website visitors will be using their mobile phones to access your site. Around 3% will be using a tablet. This means that having a site that looks great on mobile is essential. In fact, mobile is so important that Google is now using a “mobile-first” index for their website ranking algorithm.

How to Test HTML Code in a Browser – DZone Performance

The test results are based on results of more than 2,000 browsers and leave very little room for browser incompatibility. It makes sure your code works seamlessly across various desktop and mobile

How to test localhost from any device on your – Wes Bos

If you do any sort of web development locally you have probably run into at least one of the following problems: * I can’t access my local sites/apps on my mobile devices * I can’t access localhost inside of my virtual machines * My teammates can’t access my local site to view it * I need to test IE6 on my Toshiba crapbook. Pushing your site to a server isn’t ideal, especially when you are

How to Access Localhost on Mobile Browsers? – GeeksforGeeks

Just look at your IPv4 address and write it anywhere. Step 3: View your application on other devices.. Once you have both your PORT number and IPv4 address, simply type in your mobile or device browsers like IPv4 address:PORT.For example, 555.55.55.555:1234 The format is exactly the same.

Tips for keeping your site mobile-friendly – Squarespace

Use Google’s Mobile-Friendly Test to get a quick assessment of your site’s mobile compatibility. If the test says your site isn’t mobile-friendly, or if you’re having issues when you test your site on mobile, follow the tips in this guide. Note: Google’s Mobile-Friendly Test is a third-party tool and falls outside the scope of our

How to Enable Mobile View of any Site in Google Chrome

Force Google Chrome to Show Mobile Sites Only for testing purposes and for loading sites faster on slow internet connections. If you are Website Designer then might have used emulators on you PC to test your website on different devices, but now Google Chrome also have this feature as built in, you can Test your Website on Various Android, iOS, WIndows and Symbian Devices directly from Chrome.

How to Access Mobile Websites Using Your Desktop Browser

Many websites offer specific interfaces for smartphones, iPads, and other mobile devices. Whether you need to test mobile websites or you’re just curious to see what they look like, you can access them in your desktop browser.

How To Use Selenium for Mobile Cross Browser – Bitbar

The same test script, API and the workflow back up testing on native apps, mobile games, hybrid apps and the mobile web. Furthermore, your application either as APK or IPA doesn’t need any modifications or tweaks to make it testable with Appium.

How to Detect a Mobile Device with JavaScript? – The Web Dev

One way to check for a mobile device is to check the user agent. This isn’t the best way to check if a user is using a mobile device since user agent strings can be spoofed easily. However, it’s still an easy way to check what device is being used by the user. To get the user agent string, we can use the navigator.userAgent property.

Website Speed Test | Pingdom Tools

The test is designed to help make your site faster by identifying what about a webpage is fast, slow, too big, and so on. We have tried to make it useful both for experts and novices alike. In short, we wanted it to be an easy-to-use tool built to help webmasters and web developers everywhere optimize their website performance.

GTmetrix | Website Performance Testing and Monitoring

See how your page loads on different devices. Test your page on a real Android device or on over 30 different Simulated Device options. Analyze your performance with iPhones, iPads, Samsung Galaxy/Note, Google Nexus/Pixel phones, and other popular devices. Mobile Testing only available with GTmetrix PRO.

21 Sites That Will Pay You to Test Out Websites

IntelliZoomPanel is a company that conducts website usability tests for desktop and mobile devices. Tests pay $2 for simple surveys and $10 for video submissions. Most tests take between 10-20 minutes to complete, and they issue payments via PayPal 21 business days after the completion of the study. 5.

How to Access a Website Running on Localhost from a Mobile

For Windows, you can find the IP address by visiting Control Panel. In the search box, search for “adapter”. Click on View Network Connections. Select the active network connection and click View status of this connection. Click Details and the IP address should be found next to IPv4 Address. For Mac, open the Network Utility.

How to Optimize Your Website for Mobile Page Speed – Mailchimp

Do a website speed test and optimize your website performance to ensure you are providing as many mobile users as possible the fastest page possible. Even as mobile networks get faster, it’s ideal to load a page in less than 3 seconds, or by Google’s recommendations, less than 1 or 2.

How to Speed Up WordPress on Mobile (99% PSI Scores)

1. Test Mobile Speed. Think With Google is the best way to test mobile speed since it uses a 4G connection. PageSpeed Insights gives you similar recommendations but it uses a 3G connection for the mobile test. This means your WordPress site will almost always load faster on the desktop test.

How to get free metro pcs service hack 2020

Most mobile phones today come with options that are so confusing to enable and disable call waiting, call forwarding, call barring, and conference call options. Pastebin is a website where you can store text online for a set period of time. You can get into the App settings and then search for it.

How to Choose Mobile Devices for Testing – Sauce Labs

With this approach, a best practice is to automate 80% of your test cases while performing 20% manually. Best practices for choosing mobile devices for testing. With so many mobile device models and manufacturers in the market, it’s no longer a safe bet to test only on Apple and Samsung devices.

Mobile Speed Test – Test My Internet Speed

Mobile Speed Test is a website dedicated to performing mobile speed tests for the various network connections. It has been offering free mobile speed test. The website works well in all the web browsers without any plugins and is quite easy to use.

How to Check Internet Speed on PC and Mobile

Instead of opening the app or a website to check your internet speed repeatedly, you can track it from your taskbar on Windows and the status bar in Android. Both the download and upload speeds

21 Free Tools to Test Your Website – Practical Ecommerce

There are tools to measure download speed, test accessibility, locate broken links, evaluate search engine and browser compatibility, and check mobile-friendliness. Free Tests for Your Site. W3C Markup Validation