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Top 19 Free Online Tools for Validating and Analyzing Your Website


Top 19 Free Online Tools for Validating and Analyzing Your Website

Before launching any website you should check and test your website to ensure that it is working appropriately in all the browsers and Platform. Similarly, the looking of the website is awesome and compatible for any devices. Important to realize, as a professional developer you should not launch your website without properly checking. Someone can take it lightly. But you can’t imagine how it can reduce your reputation if any websites fail to perform better. Another key point, a small error in the structure or coding can make a big problem, as like if any building is made with some fatal error where millions of residents are gathering for shopping or schooling or anything. That’s why tools for validating and analyzing your product is very crucial.

The First thing to remember, we will not launch any website without checking or testing all the essential things properly. So what are the main aspects should you check? You have to check if the websites are compatible for many issues including CSS Errors, HTML Errors, Cross-browsing Errors, and various other testing. I have made a collection of most necessary tools to check validating and analyzing the code of your website. Before making any website live, make sure you have checked all the tools. Let’s get to know about best Free Online Tools for Validating and Analyzing the Code of Your Website.

Top 19 Free Online Tools for Validating and Analysing the Code of Your Website:

All the tools, I have collected for you is very authoritative and verified by the experts. So, there have no need to hesitate submitting your next websites for checking, testing and analyzing.

Website Validation Tools: Firstly, I will show you some tools which are used for checking and testing CSS, HTML, URL, and Robots validation. I have made 7 lists to check website validation.

1. CSS validator Checking Tool:

CSS validator is an awesome tool to check CSS (Cascading Style Sheet) code. The tool is free to use. When you will use this tool, it will show you all the errors and warning in your CSS file that may need to fixed. If you want to check your website’s CSS, you have to enter the URL of your website. Then when you click on the Valid CSS button, within 5 seconds it will present you all the errors and warning in a list with the address of the CSS link.

2. Html Checker and Validator Tool:

Checking the HTML code in your website is very necessary. For this reason, this free HTML checker tool can find all the elements of your web page with the probable solution. Important to realize, you can filter what kinds of results you want to check and validate including source outline image report and check error pages. Similarly, You can check your HTML web page by submitting address, file upload or text input. Another key point, the tool provides results with the W3 standard.

3. CSS lint (Checking and testing):

CSS lint is one of the popular tools for checking CSS code. CSS lint provides all kinds of errors and warnings in your code. Moreover, it checks everything in CSS file including errors, compatibility, performance, Maintainability & Duplication, Accessibility, and OOCSS. If you don’t need to check anything from the above issues you can easily disallow it from the options. By default, it will check all the issues in your CSS code.

4. CSS Validator Tool:

CSS validation services provide checking and testing of CSS code with (X)HTML. In will check both CSS and (X)HTML file. Important to realize, If you want to validate CSS code with (X)HTML, you have to confirm that embedded (X)HTML is valid. From CSS Validator Tool, you will able to check CSS code by submitting URL, by file upload and by inputting CSS code directly. On the other hand, you can set the priority by filtering from more options. Not to mention, W3C validator has been built with the assistance of Mozilla Foundation, and supported and maintained by the community.

5. CSS beautify Tool:

CSS Validator Tool is maintained by Code Validator. The tool is very user-friendly and it is an awesome tool to validate CSS code following the CSS rules. Similarly, it provides CSS errors with suggested edit options. With attention to, you are able to write the CSS code to check or you can paste the code and also you can use URL to check and validate the code from the Code Beautify.

6. Robots checker Tool:

Robots file which is also known as robots.txt is used to control your web page. Especially, you can select by robots.txt if you want to index a page or not. It is very good for SEO purposes too. If I tell in other words, robots.txt is a file which indicates some web pages that will not access the search engine. So you should check if your robots.txt file is working fine and not doing anything inhuman for your website. Making your website more user-friendly robots.txt works very fine in some cases. Another key point, it’s very good for SEO reasons.

7. URL checker Tool:

Internet Supervision is a great tool to check URL of your websites. It is important to know if your website’s URL is working fine on the web. For this reason, URL checker Tool by Internet Supervision is a free service to monitor the availability of HTML, FTP, SMTP, POP3 email servers, take care the performance of a website. On the other hand, it can also monitor e-commerce transactions (including website forms) and provides website content supervision (cyber-attack monitoring).By all means, the tools check all kinds of matter for URL checking.

Cross Browser Testing: Now, I will show you some tools for testing Cross Browser. If your website is not compatible with multiple browsers, you should solve it. So check it before launching your website.

8. Microsoft’s Browser Screenshot Generating Tools:

Microsoft’s Browser Screenshot Generating Tool is one of the best tools to check if any websites is compatible with all kinds of the favorite browser. One of the great features of the tool is it provides the screenshot of your website from the browser including Windows EDGE, Google Chrome, FireFox, Safari, Google Nexus, iPad Air, and iPhone. So, it is, all in all, to check if the website is compatible with all kinds of browsers.

9. Live and Web-Based Browser Testing Tools:

The tool is very reliable to show Cross Browsing support Testing. It checks if the website is responsive and mobile friendly. Another key point, it shows result from most popular browsers and mobile. Though it is a premium tool to check Cross Browser support, but you can use it as free with limited options. Though it is enough for a single user or developer.

10. Browser Sandbox Testing Tools:

Browser Sandbox is one of the best tools to test cross browsing support from the turbo. It checks all types of browser. As free you can also use it for unlimited time with 1GB storage. To check Cross Browser support, you will need to make an account and it’s too easy.  

11. Browsershots Testing Tools:

Browser shorts is totally free for checking cross browser. The tool will work on Linux, Windows, and MAC. It checks all kinds of popular browsers with previous version not less than 100. As free, I think it is the best tools to check cross-browser.

Accessibility and evaluation tools: In this category, we will check the accessibility of your web page to check and validate. If your website is not accessible from any places or devices, it will make your bad reputation. So make sure this checking before launching your website.

12. Web Accessibility checker Tool:

This single tool checks accessibility of your web page from different locations. On the other hand, it ensures if the content is accessed by everyone. You can check your website by entering your web page URL in the address bar. Similarly, you have to consider it to resolve the problem which it will show.

13. Web accessibility evaluation tool-WAVE:

WAVE in another popular free tool to check the accessibility of the web page. When you will check your website by WAVE, it will show you the summary of your web page including errors, alerts,  features with structural elements. It is a very good tool to check web accessibility. You can see the websites from here with CSS, without CSS and the real elements.

14. Mobile Friendly Check Tool:

This is an awesome free tool by google to check Mobile friendliness. After typing your web address, click “run test” and within few seconds it will show if your site is mobile ready with additional resources and alerts. As it is a tool by Google, so you can depend on with it for checking mobile friendliness.

15. Mobile Friendly Check By Bing:

It is an another tool to check mobile friendliness as like Google. The tool is free from bing. It will check every page, content with devices width from your web page. One the other hand, it will also test if the content is touch friendly and readable.

Website performance checkers: It’s very important to check your website for various purposes if it’s loading fast or doing all things perfectly. Check below 4 tools to check website performance.

16. Pingdom tools:

Pingdom is a great tool to test loading time of your webpage. It will show all kinds of data related to your website within seconds. On the other hand, it will provide you some suggestion to increase the loading time. Another key point, you will able to check your website from different locations. Important to realize, Pingdom is very reliable to check website performance.

17. Web page analyzer:

This is a free tool to check your website speed. When you enter your website’s URL, it will calculate page size, composition, and download time. Based on page types, it will also provide you individual tips to improve the performance of your website. Similarly, it will make easy to calculate page speed with loading time.

18. Web Page Test Tool:

It’s a web page test tool to check your website from multiple sites. You can test your web page from different locations, browsers, and devices. It will show you every report of your web page with some solution with the screenshot.

19. Google Page speed Checking tool:

It’s a great tool by Google to check page speed for every page and site performance. The tool will ensure you to make your site faster and more mobile-friendly. It will show you page speed with the user experience of your website.


At last, I will tell all the tools I have described above will check your website code, cross browser compatibility and performance. So, you will be worry free that your website is compatible with all browser and devices. Similarly, the performance of your website is very satisfactory. On the other hand, it will improve your page loading time, CSS validation and other issues. If you get this article helpful, share it on your favorite social media. Thanks in advance.

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Szabi Kisded

Hey there, I'm Szabi. At 30 years old, I quit my IT job and started my own business and became a full time WordPress plugin developer, blogger and stay-at-home dad. Here I'm documenting my journey earning an online (semi)passive income. Read more

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