Websites to Test your Code Online

Last updated on May 4th, 2023 at 05:34 pm

For Developers

Eleven Great Websites to Test your Code Online

By , January 17, 2022 7 min read

All developers and programmers have a local server, or an Integrated Development Environment (IDE) installed on their computers to test and execute programming codes. But what if you get a coding idea, and your computer isn’t nearby – What do you do then? Well, you find a web-based tool that can execute any code without downloading anything. Here is a list of 11 websites that offer the best tools for testing codes. 

Note: All of these tools require an internet connection. 

Table of content:

  1. Tools for testing codes
    1. JSBin
    2. jsFiddle
    3. CSSDeck
    4. WriteCodeOnline
    5. Tinkerbin
    6. IDEOne
    7. Dabblet
    8. CodeSandBox
    9. ESLint Demo
    10. PHPStan
    11. OneCompiler
    12. Online GDB
    13. JDoodle
    14. CodeScreener
    15. Codeply
    16. Coding Ground by TutorialsPoint
  2. Conclusion
  3. FAQs

Top 16 tools for testing code online

16 websites to test your code online

16 websites to test your code online

  1. Best tools for testing codes 1 – JS Bin

    JS Bin is a simple JavaScript debugging tool. Its key selling point is the ability to collaborate with other developers.
    The tool allows you to share a private link with developers and write and test code alongside them in real-time. Its user interface may seem a little strange at first, but it gets easier once you start working with the tool.
  2. jsFiddle

    Loved by many developers worldwide, jsFiddle is a popular tool for testing codes for programmers and by many developers around the world. Compared to other web tools, it has a very dynamic interface and even supports complicated functions.
    With jsFiddle, you can sign up for a free account and begin creating code right immediately, with no hassle. The website also provides a short URL that you can share with your friends on Twitter, Facebook, or other social media platforms.
  3. Best tools for testing codes 3 – CSSDesk

    CSSDesk has a similar layout to the other apps on our list, with source code on the left and the final render on the right. This software is ideal for building small web page models and testing lengthy CSS3 codes.
    CSSDesk program also allows you to save the source code to your computer or generate a short, shareable link that allows other developers to contribute to your code.
  4. WriteCodeOnline

    WriteCodeOnline has a beautiful UI that is lighter than other options. With WriteCodeOnline, users can test codes written in JavaScript, PHP, and more. The tool displays the output results just beneath the text box.
    As a result, when users hit execute code, the tool parses everything and shows the results. The website is not ideal for large files, but it’s an excellent way to put your fresh ideas to the test.
  5. Best tools for testing codes 5 – Tinkerbin

    Tinkerbin is a web application that allows you to experiment with HTML, JavaScript, and CSS without creating files or submitting them to a server. The application also supports CoffeeScript, Sass (with Compass), Less, HAML, and other languages. Its dashboard is pretty advanced and supports many of the same web design ideas that you’d expect to see in the future.
  6. IDEOne

    IDEone is an online compiler and debugger that allows users to compile and run code in over 40 programming languages, including Objective-C, Java, C#, VB.NET, SQL, and many others.
    You can also share this source code by storing it in a unique URL. However, the tool’s layout is packed with adverts and other material, making it impossible to use their website freely. Aside from that, it’s a fun website to play on.
  7. Best tools for testing codes 7 – Dabblet

    Dabblet is an interactive plasnippets for quickly testing CSS and HTML code. Dabblet uses a prefix-free template so that users don’t have to add any prefixes in their CSS code. With Dabblet, users can save their work in GitHub gists, embed it in other websites, and share it with other users/customers.
  8. CodeSandBox

    CodeSandBox is a web-based code editor and prototyping tool that makes creating and sharing web apps easy. It’s a javascript editor with a lot of bells and whistles.
    CodeSandBox supports all React.js, Vue.js, Svelte, and Node.js. NPM dependencies will be downloaded automatically by CodeSandbox. Another use for CodeSandBox is web-based terminal access.
    Related post: Why and When to Use Node JS: A Brief Guide
  9. Best tools for testing codes 9 – ESLint Demo

    You can use ESLint to create writing rules for your code. It’s an excellent option if you’re working on a team project and want to make sure that everyone writes code in the same style and follows the same guidelines.
    ESLint offers so many options for governing your code styles that picking one may be intimidating, especially if you’re just getting started with the tool.
  10. PHPStan

    PHPStan is a PHP code static analysis tool that checks for faults and potential flaws without running the code. For example, the tool will notify you if you send a string value to a method that accepts an integer or if you try to access a property on a class that doesn’t exist.
    Use the online editor on the PHPStan website to see how it works. You’ll be surprised to see how many existing PHP codes may be improved and fixed to eliminate potential issues.
  11. Best tools for testing codes 11 – OneCompiler

    OneCompiler is a free online compiler tool. It helps you write, run and share code online in more than 60 programming languages, including popular programming languages, such as Java, Python, MySQL, C, C++, NodeJS, Jshell & HTML. This tool is ideal for fast testing your code for a demo or running a short test.
  12. Online GDB

    OnlineGDB is a free online compiler and debugger tool that supports several programming languages including C, C++, Java, Python, and PHP. It enables online code writing, compilation, and execution without the requirement for setup or installation. With features like syntax highlighting, code completion, and debugging tools like breakpoints and watchpoints, OnlineGDB offers a user-friendly interface. Additionally, it offers a console to show the code’s output, making it simple to test and debug code in real-time. Developers may easily and effectively test their code online with OnlineGDB as a whole.

  13. JDoodle

    Programming languages including C, C++, Java, Python, Ruby, Perl, and more can be compiled and edited online using JDoodle. Without any setup or installation, it enables users to write, compile, and run code online. With features like code completion, syntax highlighting, and the option to share code, JDoodle offers a straightforward and user-friendly interface. It also offers a console to show the code’s output, making it simple to test and debug code in real-time. JDoodle is, all things considered, a helpful and effective solution for developers to quickly test and run code online.

  14. CodeScreener

    You may test, exchange, and assess code using CodeScreener. It is compatible with a wide range of programming languages, including C, C++, Java, Python, Ruby, and more. In addition to syntax highlighting, code completion, and debugging features like breakpoints and watchpoints, the website offers a code editor. Through the console, it is simple to execute your code and check for functionality. CodeScreener also makes it possible for you to distribute your code to others by creating a special URL that anyone may view.

    CodeScreener also enables you to assess code by creating online exams with time constraints, specific input/output values, and multiple-choice questions. This makes it a fantastic tool for educators and hiring managers who wish to evaluate students’ or job seekers’ programming abilities. Additionally, CodeScreener offers a dashboard where you can manage your tests and see the results immediately. In conclusion, CodeScreener is a thorough online platform that streamlines the testing, sharing, and evaluation of code.

  15. Codeply

    Developers may write, test, and share front-end web development code using a user-friendly interface on Codeply, an online playground for HTML, CSS, and JavaScript. It has features like live preview, code completion, and syntax highlighting and supports a number of frameworks, including Bootstrap and Foundation. Codeply makes it simple to cooperate with others by enabling developers to share their code via a specific URL. Teams working on web development projects can benefit from using it because it also has a Pro edition with advanced capabilities.

  16. Coding Ground by TutorialsPoint

    The online development environment Coding Ground by TutorialsPoint enables you to write code, generate programs, and run them online. It provides a range of domains, including C, C++, Java, Python, PHP, and others. The integrated editor allows you to test your code and has debugging tools like breakpoints and watchpoints, as well as syntax highlighting and code completion. A range of lessons and tools are also accessible on the internet, which you can utilize to advance your programming skills. In conclusion, Coding Ground by TutorialsPoint is a great tool for programmers of all experience levels who wish to sharpen their coding skills and experiment with different languages.

Final thoughts

These tools for testing codes make it simple to work, run code online, and collaborate with other developers. But remember, though these tools can help you along the path to building your final product, they are not your actual, heavy-duty programming and testing tools. And thus, one should use these when they want to test their code’s capability on the go. 

Related post: The Basics of Web Application Penetration Testing

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  1. Where can I test JavaScript code online?
    You can test JavaScript code on a number of websites, including CodePen, JSFiddle, JS Bin,, and PlayCode. These platforms offer an easy-to-use code editor for creating and testing JavaScript code, as well as a console to show the results. It is simple to test front-end web development code because they also support HTML and CSS. These websites are helpful for cooperation and exhibiting your work because they also let you store and share your code with others. Developers may quickly test and play with JavaScript code using these online tools without the need for a cumbersome setup or local development environments.

  2. How can I test my code online?
    Testing your code online is an efficient way to debug issues and experiment with new ideas without the need for a local development environment. Find a web-based code editor or development environment, like CodePen or JSFiddle, that supports your programming language to accomplish this. Run your code in the online environment using the built-in debugging and testing tools, or import it from a file. Till it performs as anticipated, make necessary adjustments and retest. Finally, save and distribute your code so that others can work with you or see your best work.

  3. Where can I test my HTML code?
    In a web browser like Safari, Firefox, or Chrome, you can test your HTML code. To see how it appears and works, simply create an HTML file and open it in a browser. You can also utilize online tools like CodePen, JSFiddle, and JS Bin, which let you write HTML, CSS, and JavaScript code in an easy-to-use editor and test it while viewing the results in real time. and Coding Ground are two other online code editors that offer a web-based development environment for testing HTML code and other programming languages.

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16 Good and Free Online Tools for Testing Codes
Article Name
16 Good and Free Online Tools for Testing Codes
The market has several web-based tools for testing to ensure your code generates the desired output. But which tool is the best for you? Keep reading to know!


  • Ankit Sahu

    Ankit is a writer and editor who has contributed his expertise to Govt of India, Reebok, Abbott, TimesPro, Chitale Bandhu, InsideAIML, Kolte Patil Dev., etc.

  • Ritvik Gupta

    Ritvik is a copywriter and content writer who has worked with fast-scaling startups such as GoMechanic and Pitstop. He runs his own automotive blog as well.


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