Top 30+ Web Application Testing Tools In 2020 (Comprehensive List)

A Comprehensive List Of The Top Web Application Testing Tools In 2020.

It's a testing methodology focused on web applications i.e. applications hosted on the web.

With web application testing, issues such as website functionality, security, accessibility, usability, compatibility, and performance are uncovered before the web application is released in public.

Web Application Testing Tools:

Today, in this tutorial we have tried to list almost all popular Web Application testing tools that are used to find issues present in any web application.

Most Popular Web Application Testing Tools

Here is the comprehensive list of the most widely used web app testing tools grouped by the types of testing:

• Load, Stress and Performance Testing Tools
• Web Functional, GUI or Regression testing Tools
• Link Manager testing tools
• Web Site Security Testing Tools
• Cross-browser testing tools
• W3C CSS validator
• W3C Link Checker

Let's start with a detailed list.

Overall Top Web Application Testing Tools

These are the top Web Testing tools from all the categories.

#1) WebLOAD

WebLOAD is an enterprise-scale load testing tool with powerful scripting capabilities that make it easy to test complex scenarios. The tool provides a clear analysis of your web application performance, pinpointing issues and bottlenecks that may stand in the way of achieving your load and response requirements.

WebLOAD supports hundreds of technologies – from web protocols to enterprise applications and has built-in integration with Jenkins, Selenium and many other tools to enable continuous load testing for DevOps.

Website and Download link: WebLOAD

#2) test IO

Make sure that your web apps and websites work everywhere by crowd testing it in real browsers on real devices and under real-world conditions. Crowdtesting with test IO lets you call upon the skill and insight of thousands of testing professionals to improve the quality of your web apps and websites.

Over two hundred customer-obsessed organizations rely on the power and flexibility of test IO to ship high-quality software faster.

Features:

• Test on real devices – Expand your coverage to hundreds of devices, platforms, and real people in real-world conditions. Make sure your software works on every device, OS, and browser.
• Get feedback from real humans – Our professional testers have fresh and unbiased eyes on your product. Testers find bugs that your internal team might not catch.
• Release faster – Human-powered doesn’t mean slow. Remove the QA bottleneck with on-demand, flexible testing that scales up with your needs.

Website: test IO

#3) Acunetix

Acunetix is a fully automated web application security scanner that detects and reports on over 4500 web application vulnerabilities including all variants of SQL Injection and XSS.

The Acunetix crawler fully supports HTML5 and JavaScript and Single-page applications, allowing auditing of complex, authenticated applications.

It bakes in advanced Vulnerability Management features right-into its core, prioritizing risks based on data through a single, consolidated view, and integrating the scanner’s results into other tools and platforms.

Website: Acunetix

#4) Netsparker

Netsparker is a dead accurate automated web application security scanner that will identify vulnerabilities such as SQL Injection and Cross-site Scripting in web applications and web APIs. 

Netsparker uniquely verifies the identified vulnerabilities proving they are real and not false positives, so you do not need to waste hours manually verifying the identified vulnerabilities once a scan is finished.

It is available as a Windows software and an online service.

Website: Netsparker

#5) Ranorex Webtestit

Ranorex Webtestit delivers out-of-the-box web test automation for Selenium or Protractor, using Java or TypeScript: dramatically reducing your configuration overhead.

Save vital time with automatic creation of page objects, UI element locators, and boilerplate code; built-in test reporting, and more. Distribute cross-browser tests to local WebDriver endpoints, a Selenium Grid, or a cloud-based provider.

Key Features:

• Scaffolds your test framework.
• Automatically applies best practices such as the Page Object pattern.
• Instantly generates UI selectors and screenshots using the Ranorex Selocity extension for the Chrome DevTools.
• Produces robust and maintainable test suites.
• Integrates with tools such as Jira for defect tracking, CI servers such as VSTS and Jenkins, and TestRail test case management.

Website: Ranorex Webtestit

#6) TestComplete Web

• TestComplete is a functional UI automated testing tool that you can use to create and run tests on any desktop or mobile web application, including apps that have custom controls and dynamic pages.
• Ensure your web UI tests don’t break with TestComplete’s powerful object identification engine. You can choose from over 50k object properties across more than 500 control types.
• Run one UI test across all major web browsers. Access over a thousand browser, OS, &resolution configurations in the on-demand cloud lab.

Website: TestComplete Web

#7) Experitest

Easily test your website and web applications across 1000+ desktop and mobile browsers in the cloud with automated or manual cross-browser testing tools.

• Test on any browser
• Run Selenium and Appium tests on 1,000+ browser types, versions, and operating systems
• Interact with your app in real-time and debug it
• Execute hundreds of tests in parallel
• Integrate with your CI/CD workflow
• Perform visual testing to verify UI responsiveness across different resolutions
• Get visual test reports with screenshots, videos, and log files

Website: Experites

#8) TestCraft

TestCraft is a test automation platform for regression and continuous testing, as well as monitoring of web applications. Its revolutionary AI technology and unique visual modeling allow for faster test creation and execution while eliminating test maintenance overhead.

Testers create fully automated test scenarios without coding. Customers find bugs quickly, release more frequently, integrate with the CI/CD approach and improve the overall quality of their digital products.

Key Features:

• No programming skills required. Leverage manual testers’ business knowledge and allow them to create automated test scenarios
• Substantially reduce maintenance costs. Scripts are automatically adjusted to change due to our AI algorithm. Major changes are adapted with a few clicks
• Selenium-based. Quickly integrate and leverage modules developed by the community
• Provides immediate time to value. Nothing to install (SaaS). Easy to master

Website: TestCraft

#9) ImmuniWeb®

ImmuniWeb® is a Swiss-based global provider of web, mobile, and API application penetration testing and security scoring. ImmuniWeb® AI Platform leverages Machine Learning and AI for intelligent automation and acceleration of threat-aware penetration testing.

Driven by human intelligence, it rapidly detects even the most sophisticated vulnerabilities and comes with a zero false-positive SLA.

ImmuniWeb® AI Platform consists of the following four main products:

• ImmuniWeb® Discovery for asset inventory and security ratings (web, mobile, cloud, domains, certs, IoT);
• ImmuniWeb® On-Demand for web penetration testing (web, API, cloud, AWS);
• ImmuniWeb® MobileSuite for mobile penetration testing (iOS and Android App, Backend API);
• ImmuniWeb® Continuous for 24/7 continuous monitoring and penetration testing (web, API, cloud, AWS).

For the benefit of the cybersecurity community, ImmuniWeb also offers these powerful and absolutely FREE security tests: SSL Security Test, Website Security Test, Mobile App Security Test, and Phishing Test

ImmuniWeb® is a winner of SC Awards Europe 2018 in the “Best Usage of AI and Machine Learning” category, where it outperformed other finalists including IBM Watson.

Website: ImmuniWeb®

#10) LambdaTest

LambdaTest is a scalable cloud-based cross-browser testing platform designed to offer all website or web app testing need to cloud infrastructure.

LambdaTest platform helps you to ensure your web app elements (such as JavaScript, CSS, HTLM5, Video…etc.) render seamlessly across every desktop and mobile web browser with support of manual, visual, and automated testing. With LambdaTest, you can access up to 2000+ combinations of desktop and mobile browsers on the cloud.

Website: LambdaTest

Here are some specific Software Testing Tools by different types of testing:

Web Functional/Regression Testing Tools

Many websites/web applications suffer from bugs due to their improper functionality, behavior, usability, security, etc. For those websites/web applications, web testing tools do magic (these Testing tools take out all bugs from websites/web applications in the limited time period and limited cost).

Determining and fixing a bug, drafting a bug sheet, and determining priority and severity is hard during the development phase of websites. Most of the bugs come due to the functional issue of the website/web application.

So, to come out of functional issues, we have tried to provide some Web Functional/Regression Testing tools.

1. TestComplete Web
2. TestCraft
3. Selenium
4. Katalon Studio
5. CasperJS
6. Screenster
7. SoapUI
8. Sahi
9. Watin
10. Watir
11. QTP (UFT)
12. TimeShiftX

Let's see a detailed review of each.

#1) TestComplete Web

• TestComplete is a functional UI automated testing tool that you can use to create and run tests on any desktop or mobile web application, including apps that have custom controls and dynamic pages.
• Ensure your web UI tests don’t break with TestComplete’s powerful object identification engine. You can choose from over 50k object properties across more than 500 control types.
• Run one UI test across all major web browsers. Access over a thousand browser, OS, &resolution configurations in the on-demand cloud lab.

Website: TestComplete Web

#2) TestCraft

TestCraft is a test automation platform for regression and continuous testing, as well as monitoring of web applications. Its revolutionary AI technology and unique visual modeling allow for faster test creation and execution while eliminating test maintenance overhead.

Testers create fully automated test scenarios without coding. Customers find bugs quickly, release more frequently, integrate with the CI/CD approach and improve the overall quality of their digital products.

Key Features:

• No programming skills required. Leverage manual testers’ business knowledge and allow them to create automated test scenarios
• Substantially reduce maintenance costs. Scripts are automatically adjusted to change due to our AI algorithm. Major changes are adapted with a few clicks
• Selenium-based. Quickly integrate and leverage modules developed by the community
• It provides immediate time to value. Nothing to install (SaaS). Easy to master

Website: TestCraft

#3) Selenium

Selenium is one of the most popular automated testing suites. Selenium is designed in a way to support and encourage automation testing of functional aspects of web-based applications and a wide range of browsers and platforms.

Selenium suite is comprised of 4 basic components; Selenium IDE, Selenium RC, WebDriver, Selenium Grid. Selenium IDE is a Firefox add-on for record-and-playback web application tests. WebDriver directly communicates with the web browser and uses its native compatibility to automate.

Website: Selenium

#4) CasperJS

It is an easy to use open-source navigation tool for Windows, macOS, and Linux OS, used for scripting & testing the PhantomJS and SlimerJS (Gecko) with the help of its useful and valuable functions, methods and syntactic sugar, written in Javascript language.

Basically, it works for forms, links, page screenshot, remote DOM, events sign-in process, etc. Also, downloads binary and other resources write functional test suites and save it in a JUnit XML format.

Website: CasperJS

#5) Katalon Studio

A complete web and mobile automation tool that enhances the capabilities of Selenium and Appium, Katalon Studio is packed with many essential features, including Object Spy, Record & Playback, Cross-browser execution, JIRA integration, Keyword-Driven Testing, Data-Driven Testing, and Web Service Testing while remaining a free solution.

Available for both Windows and Mac users, Katalon Studio requires a minimum programming background to help the manual testing team transforming into automation effortlessly.

Website: Katalon Studio

#6) Screenster

It is a UI based functional and regression testing tool for web applications that works on all Windows OS that requires all major browsers and Java6 or high. A very good screen validator uses to give 10x productivity without a single line of code.

During operation, it takes a screenshot on each and every step and compares them to baseline, permits verification of changes or lack of changes to UI, provides full access to Selenium API when needed.

Website: Screenster

#7) SoapUI

A cross-platform free open source functional testing tool for service-oriented architectures (SOA) and representational state transfers (REST), written in Java language.

Its user-friendly interface acquires various features, mainly used for API testing facilitates to easily and quickly perform functional/regression and load testing supports all protocols and technologies related to the particular application. Its commercial version (SoapUI Pro) is mainly used to test the functionality of the application.

Website: SOAPUI

#8) Sahi

It is an open-source cross-platform web application testing tool, written in Java and JavaScript, released under an Open Source Apache License 2.0. It is available in Pro v5.1.2 is used to test multiple browsers applications (holds many AJAX and dynamic content) under web 2.0.

Sahi Pro identifies elements very easily and also works on application includes dynamic ids (_near and _in) and applications development using ExtJS, ZK, Dojo, YUI, etc.

Website: Sahi 

#9) Watin (Web Application Testing in .Net)

A cross-platform web application testing tool, the latest version is 2.1 and developed in C# language. Due to the influence of Watir, Watin tested a web application written in .Net in December 2005.

Now, it has become a user-friendly and stable framework with much functionality supports all main HTML elements and dialogues (modal and modeless). Also, supports the native Page and Control model, testing of AJAX website, screenshots of the web pages creation process, and frames (cross-domain) and iframes.

It takes care of popular popup dialogue box: alert, confirm, login, etc. and works on Internet Explorer 6, 7, 8, 9 and Firefox 2 and 3. You can download it more than 120.000 times

Website: WatiN

#10) Watir (Web Application Testing in Ruby)

An open-source (BSD) cross-platform web application testing tool, pronounced as water. It is an easy and flexible automation tool of Ruby libraries for web browsers automation.

Although, it is of Ruby libraries, supports applications written in any language and just like other languages, Ruby enables you to link to databases, export XML files, read files and spreadsheets, and organize your code as reusable libraries. Watir drives Internet Explorer, Firefox, Chrome, Opera and Safari browsers in the same ways how others do.

Website: Watir

#11) QTP (UFT)

QTP (Quick Test Professional) a Windows-based software testing tool used to test the applications on the web or desktop, best for “Functional” and “Regression” testing, given by Micro Focus.

Its UI is called an Integrated Development Environment (IDE) comes with various functionalities which motivates tester towards testing. QTP uses VB Script language to run the script and supports Web, Java (Core and Advanced),.Net, Flex, Web Services, WPF, Delphi, Power Builder, Stingray 1, Terminal Emulator, SAP, Oracle, Siebel, PeopleSoft, Windows Mobile, VisualAge Smalltalk, Silverlight, and mainframe terminal emulators.

QTP's latest version is UFT 12.0. UFT 12.0 provides an easier and smaller package to download the product, that’s why; UFT 12.0 installation process has become easier than the previous one.

QTP was only working on Windows operating system, but UFT 12.0 supports Safari on a remote Mac, all useful browsers(Internet Explorer6, 7, 8, 9, 10, 11, Firefox 3.0.X, 3.5, 3.6 to v24 and Google Chrome), desktop technologies (Delphi XE2, Stingray 12, Flex, and Web Dynpro ABAP for Netweaver 7.31), and Visual Studio (2010 and 2012).

Website: Micro Focus Unified Functional Testing (UFT)

#12) TimeShiftX

TimeShiftX is a date shifting software that lets you time travel software applications into the future or past for time shift testing of all temporal sensitive functionality such as year-end, daylight savings, leap year, billing, rates, policies, etc.

TimeShiftX uses virtual clocks to enable time to travel inside of Active Directory & Kerberos without code changes, manual system work, or server isolation.

TimeShiftX is a multi-platform solution (Windows, Linux, AIX, Solaris, Red Hat, SUSE, etc.) and supports time travel for all applications, databases, and web technologies such as SQL, SAP, Oracle, .NET, IIS, WebSphere, Java, DB2, PeopleSoft, JBoss, Apache, PHP, and MySQL.

Website: TimeShiftX

Top Load, Stress And Performance Testing Tools

Here are some important tools used to test the performance, load and stress of the web application. These tools ensure that your web application will run under high performance and less load & stress.

1. WebLOAD
2. Apache JMeter
3. NeoLoad
4. LoadRunner
5. LoadUI
6. Loadster
7. Load impact
8. Wapt
9. Telerik test studio

#1) WebLOAD

WebLOAD is an enterprise-scale load testing tool with powerful scripting capabilities that make it easy to test complex scenarios. The tool provides a clear analysis of your web application performance, pinpointing issues and bottlenecks that may stand in the way of achieving your load and response requirements.

WebLOAD supports hundreds of technologies – from web protocols to enterprise applications and has built-in integration with Jenkins, Selenium and many other tools to enable continuous load testing for DevOps.

Website: WebLOAD

#2) Apache JMeter

It is an Apache Open source load testing tool, written in Java 6+ and supports all platforms. Recently, Apache released the stable version of JMeter “v2.11” that supports all platforms.

Basically, JMeter is used for load testing and analyzing and measuring the performance of the system/application.

Also, this tool is helpful in testing JDBC database connections (FTP, LDAP, Web services, JMS, HTTP, HTTPS, TCP connections) and OS Native processes. It analyses overall performance under different load on a server, group of servers & network place.

Capability to check the performance of the SOAP, LDAP, Message-oriented middleware (MOM) via JMS, Mail (SMTP(S), POP3(S) and IMAP(S)), MongoDB (NoSQL), and Native commands or shell scripts. Its strong GUI design helps in the fast building of the Test Plan and debugging process.

Website: JMeter

#3) NeoLoad

It is a Neotys load and stress testing tool for Windows, Linux, and Solaris, available in English and French with the latest version 4.2, designed to measure, analyze and improve the performance of the website. Although load increases on the website due to simultaneous access of many users, this tool will be helpful in checking the performance of the website under heavy load.

The testing process by using this tool will be very fast, efficient, and frequent. By using this tool we can get a very fast result. Give surety that your website will be accurate and reliable to fulfill the business and user expectations

Website: Neoload

#4) LoadRunner

It is a load testing tool for Windows and Linux, given by HP(now Micro Focus) to test the web and other applications very efficiently before it goes to the end user's hands. It is available in stable version 12.0 in many languages.

LoadRunner is very much helpful in determining the performance and result of the web application under heavy load (load due to thousands of users accessing the web application at the same time).

It handles various protocols for load testing: .NET Record/Replay, Database, DCOM, GUI Virtual Users, Java Record/Replay, Network, Oracle E-Business, Remote Access, Remote Desktop, Rich Internet Applications, SAP, SOA, Web 2.0, Web and Multimedia and Wireless.

Website: Micro Focus LoadRunner

#5) LoadUI

A load testing tool “LoadUI” latest version is 2.7, written in Java, JavaFX, and Groovy language, and supports all platforms. Mostly, support web services and SopaUI 5.0 (functional testing tool).

This latest version corrected some issues that were there in the previous version (v2.6) of LoadUI, issue: “File “.bat, .sh and .command” line ending issue” and the About LoadUI dialog box does not display always.

Now, it is available in the Pro version. LoadUI Pro drag-and-drop powerful interface facilitates you to test the overall load efficiently in a real-time environment.

Website: LoadUI

#6) Loadster

A commercial load testing tool to test websites, web applications/services (HTTP web services) and to simulate and guess how web applications will perform under heavy load, given by Loadster, supports Linux, Mac, and Windows. This full-featured tool works on actual web applications/services cookies, sessions, custom header, dynamic form of data, etc…

Loadster is used to test the performance, stability, and scalability of web applications/services and websites. It simulates numbers of users, networking with the site and collects stats for each virtual user distinctly. Load testing assists to determine performance bottlenecks, expect and avoid crashes, and confirm your application can handle high traffic events.

Website: Loadster

#7) Load Impact

An online load testing tool used to test websites, web applications, mobile applications and APIs under heavy load for all platforms.

Load impact uses to test all applications/services and websites online, instead of setting-up offline to test the application. The testing process is very fast and simple. You can also repeat the test very easily in very little time.

Website: LoadImpact

#8) Wapt

A load and stress testing tool works on all Windows, provides an easy and cheapest way to test websites, like; business applications websites, mobile websites, web portals, etc. Testing requires 500MB of free disc space, browsers (Microsoft IE 6 or higher, Firefox 3.0 or higher, and Google Chrome), and OS of the 64-bit version.

It works on secure HTTPS websites, dynamic content and RIA applications under data-driven mode

Website: Wapt

#9) Telerik Test Studio

A software testing tool is to test web and desktop applications of all Windows OS, developed by Telerik. It tests the functionality, performance, and load of the web, desktop, and mobile applications. The tool offers a plugin for Visual Studio and a standalone app that used to test the cross-browsing issue and have the same file format.

Test Studio supports, languages; HTML, AJAX, Silverlight, ASP.NET MVC, JavaScript and WPF and run test on browsers; Internet Explorer, Firefox, Safari and Chrome.

Website: Telerik Test Studio

Link Manager Testing Tools

All websites are made up of many links or we can say all websites are based on links. Any broken and wrong link can take you to some wrong page and you will get wrong information about the website. So, it is very much important to correct the link using the link manager testing tool,

1. SpringTrax
2. LinkTiger
3. LinkScan

#1) SpringTrax

It is a cross-platform link checker provided by SpringTrax Inc., an expert in finding broken links, and also expert in discovering, fixing, and stopping 404 errors. It evaluates why the traffic has been lost. It monitors each and every visitors using JavaScript tracker code, and analyses every 404 error instantaneously.

Website: SpringTrax

#2) LinkTiger

It is also a link checker, works on e-mail alerts, dashboards, and rich custom reports, supports Linux, Mac, Windows, and Windows Phone platforms. Its scan features can scan PDF, CSS, Flash and MS Office files, flash-animation.

LinkTiger displays the status of all links present on the website with an intuitive dashboard. For each website, the dashboard displays three pie-charts with the pages status, the link status and the error types of the dead link.

Website: LinkTiger

#3) LinkScan

It is a strong link checker and website mapping tool for Windows, Unix, Linux, and Mac OS X, provides very strong test automation skills for web-based applications, available for Unix and Microsoft Windows operating systems, highly customizable and fast. It is also a good HTML validator.

Website: LinkScan

Web Site Security Testing Tools

Most of the virus comes to the system through an application that is uploaded on the internet that can corrupt the system and the application which is on the system. We cannot stop using the application which is on the internet, so, the best thing is; use those applications securely by using website security testing tool.

1. Acunetix
2. Netsparker
3. NTOSpider
4. Brakeman
5. SiteDigger
6. NMap
7. OWASP

#1) Acunetix

Acunetix is a fully automated web application security scanner that detects and reports on over 4500 web application vulnerabilities including all variants of SQL Injection and XSS.

The Acunetix crawler fully supports HTML5 and JavaScript and Single-page applications, allowing auditing of complex, authenticated applications.

It bakes in advanced Vulnerability Management features right-into its core, prioritizing risks based on data through a single, consolidated view, and integrating the scanner’s results into other tools and platforms.

Website: Acunetix 

#2) NTOSpider

It is a Windows-based web security tool, provides full security to the web applications/services, mobile, and rich internet applications (RIA’s). The most important thing is, it scans your application fully in less time, provides full security to the system at very less cost.

Website: NTOSpider 

#3) Netsparker

A cross-platform web application security scanner is helpful in detecting and reporting website/web application vulnerabilities (SQL Injection and Cross-site Scripting (XSS)) and security issues, no matter on which platform and technology the website/web application has built-in.

Website: Netsparker

#4) Brakeman

It is an open-source scanner, checks Ruby on Rails apps for security vulnerabilities, available for Jenkins/Hudson and works on Rails 2.x, 3.x, and 4.x. It statically examines Rails application code to discovery security problems at any stage of development.

Installation Path: Brakeman

#5) SiteDigger

It is an expert in examining Google’s cache, errors, configuration problems, proprietary information, and remarkable security nuggets on websites.

Having a very good user interface and provides real-time result in the result page with the ability to save the signature selection and result set, Google API License Key is not required to access this tool. It runs on All Windows OS required Microsoft .NET Framework v3.5.

Website: SiteDigger

#6) NMap (Network Mapper)

A cross-platform web security scanner, written by Gordon Lyon (Fyodor) founder of hosts and services on a computer network.

This scanner delivers correct packets to the target machine and examines the response comes from there. Earlier, Nmap was only for Linux, but it is for Microsoft Windows, BSD variants – Mac OS X, AmigaOS, Solaris, HP-UX, , and SGI IRIX.

Website: NMap

#7) OWASP

A cross-platform online security project/community involves worldwide organizations, educational organizations and individuals to focus on security on web applications by creating free articles, documentation, techniques, and tools.

Website: OWASP

Cross Browser Testing Tools

The cross-browsing issue comes due to the comparison of two or more browsers output values. So, to come out of that issue, use the cross-browser testing tool,

1. Browsera
2. IE NetRenderer
3. IETester

#1) Browsera

An online cross-browser testing tool works on Windows and Mac OS X platform, given by Browsera, finds cross-browser layout issues automatically by comparing each browser's output. After completion of the test, each and every JavaScript errors are reported and collected. The site crawling feature of the tool is very much helpful in testing all the pages of the site.

Website: Browsera

#2) IE NetRenderer

A free HTML tool for Apple iMac and Linux, given by GEOTEK Netzwerkservice Berlin, facilitates users to see how their website displays in IE browsers 5.5 to 11. Additionally, it also displays a large number of capturing jobs in parallel and in real-time. These services are very fast.

Website: IE NetRenderer

#3) IETester

A Windows web browser developed by Core Services provides a user-friendly interface facilitates users to avail all functionality easily and quickly. A very easy configuration without customization mainly focuses on speed and efficiency.

It’s Microsoft ”ribbon” toolbar facilitates users to switch between Internet Explorer versions (5.5 to 9) from the same interface with a single click. Its inbuilt feature “Favorites” list includes many websites that you can use for compatibility tests.

Website: IETester

W3C CSS Validator

The W3C CSS Validator is free software given by the W3C, provides services to designers and developers of a web application to check Cascading Style Sheets (CSS).

At present, most of the websites are developed using HTML language, this language is basically used to display text on the page, giving links, and placing multiple objects. To give style (color and layout) to the text of the page, HTML uses CSS (Cascading Style Sheets). The W3C CSS validator used to check CSS and X(HTML) documents with the style sheets.

Website: W3C CSS Validator

W3C Link Checker

A link checking service provided by W3C used to check links and anchors presents on a page of the website or whole website using languages; HTML, XHTML or CSS.

Website: W3C Link Checker

This is it!

Recommended reading => Web Testing Complete Guide

Also, Read => If you want to check the detailed list of all the tools under these categories please visit these automation testing tools list:

• Top 15 Performance Testing Tools
• 37 Powerful Penetration Testing Tools
• 5 Best Android Application Testing Tools
• 12 Best Cross Browser Testing Tools

Conclusion

This is by far the most comprehensive list of web application testing tools. 

=> Contact us to suggest a listing here.