7 of the Best Code Playgrounds & CodePen Alternatives

In recent years, various front-end code sandboxes have emerged one after another. Most sandboxes provide a quick and easy way to experiment with client (and sometimes server-side) code and then share it with others. The most popular is CodePen, which you most likely have seen or used. It's a great tool, but it doesn't offer all the features you might need. Here is our review of the seven best code sandboxes, comparing CodePen to some CodePen alternatives.

Online coding sandbox usually includes:

• Color-coded HTML, CSS and JavaScript Editors
• Code commands are automatically completed
• The preview window (usually) can be reloaded in real time without manual refresh
• HTML preprocessor, such as HAML
• Less, Sass, Stylus and similar CSS preprocessors
• Contains popular JavaScript libraries such as React, Preact, Angular, and Vue.js (some newer sandboxes also allow backend code development)
• Developer Console and Code Verification Tool
• Code collaboration tool
• Share via short URL
• Embing the demo into other pages
• Code cloning and derivation
• Copy to code repository, e.g. GitHub
• Free basic services
• Enjoy more advanced services with a small monthly fee
• Show the world your coding skills!

They allow you to test and retain experimental code snippets without creating files, starting an editor, or running a local server.

Let's look at some better options.

Key Points

• Online encoding sandboxes (such as CodePen, JSFiddle, JS Bin, CSS Deck, CodeSandbox, PLAYCODE and Plunker) provide color-coded HTML, CSS and JavaScript editors, automatic code command completion, real-time reloading of preview windows, HTML Preprocessors, CSS preprocessors, popular JavaScript libraries, developer consoles, code verification tools, and code collaboration tools.
• Code Sandbox provides a quick way to experiment with client and server-side code, share with others, and test and store experimental code snippets without creating files or running a local server. They also provide a way to demonstrate your coding skills.
• While CodePen is one of the most popular and beautiful code sandboxes, alternatives such as JSFiddle, JS Bin, CSS Deck, CodeSandbox, PLAYCODE and Plunker provide unique features and features such as multi-file editing, asynchronous Ajax requests mockup, entire HTML file editing, and more.

1. CodePen

CodePen is not the first, but it is one of the most popular and beautiful code sandboxes. The service was co-founded by Chris Coyier of CSS-Tricks, and it focuses on popular Pens (client demos) and Projects (online integrated development environments you can use to build web projects). It provides a clean and powerful user editing interface with advanced features such as sharing, embedding, error console, external JavaScript libraries, popular CSS preprocessors, and more.

CodePen PRO offers private Pens, asset custody, collaboration mode and embedded iframe themes starting at $8 per month.

2. JSFiddle

JSFiddle is one of the earliest code sandboxes and affects subsequent sandboxes. It can be used for any combination of HTML, CSS, and JavaScript testing and provides a range of libraries and frameworks. Unusually, it can also simulate asynchronous Ajax requests.

JSFiddle focuses on code, so you won't find a range of social features such as highlighted demos and sharing tools. This interface is simpler than the others, and unusually, you have to click Run to reload the results pane. However, it always feels fast and its simplicity may be more favored by some.

3. JS Bin

JS Bin was created by JavaScript master Remy Sharp and is still managed by him today. It focuses on coding basics and handles them well. Unlike some other sandboxes, you can edit the entire HTML file, including the tag. In addition to the usual options, libraries, and preprocessors, JS Bin was one of the first sandboxes to provide log consoles, which was crucial for JavaScript development. Commercial Pro accounts offer advanced features such as asset uploads, private bins, personalized URLs, and Dropbox synchronization. If you are worried about privacy or don't want others to see the status of your code, you can even download and install JS Bin locally!

4. CSS Deck

Despite the name, CSS Deck is a fully functional HTML, CSS and JavaScript sandbox with social and collaboration capabilities. It has been around for a long time and has had a significant impact on other sandboxes. The CSS Deck isn't as capable as the CodePen, but it feels faster and has a more configurable coded layout screen. There is an active community that regularly submits sample code demonstrations.

5. CodeSandbox

Most code sandboxes provide an HTML file, a CSS file, and a JavaScript file (although more files may be imported). CodeSandbox is not just a sandbox, it is more like an online development environment.

Like standard web projects, you can add as many files as you like and edit them using a multi-tag, VS Code-like integrated development environment (IDE). Signing up with a GitHub or Google account is free, but you can collaborate with others in real time to export projects to Git repositories and deploy them to static site hosts such as Netlify and Vercel.

CodeSandbox may be a practical option if you work remotely or use an atypical development device such as a Chromebook.

6. PLAYCODE

PLAYCODE is another online development environment that allows you to add multiple HTML, CSS, JavaScript, and asset files. The interface is simpler than CodeSandbox, but it's fast, beautifully-looking, easy to use, and may be less daunting for beginners.

PLAYCODE has a log console, and unusually, it allows you to control the size and update frequency of the preview window. The editor is free, but you must be logged in with a Google, Microsoft, GitHub, or email account to save the project.

7. Plunker

Plunker is another project-based editor that allows you to add multiple HTML, CSS, and JavaScript files. You can include community-generated templates to start your project. Like other sandboxes, Plunker allows you to create work presentations, collaborate with other developers, and share your work. It may not be as attractive as some sandboxes, but the UI remains fast and powerful.

There is an active community of contributors. Most people seem to submit Angular demos, but it also supports vanilla JS, React, and Preact launch templates.

Other options

Of course, there are many other code sandboxes, including Glitch, ESNextBin, JSitor, Liveweave, Dabblet, and more. StackBlitz is a newer sandbox that supports front-end development, but also allows you to experiment with back-end code using Node.js, Next.js, and GraphQL.

Tip: To try StackBlitz, just enter "node.new" (without quotes) in the browser's address bar.

Did we miss your favorite sandbox? Please tell us!

For more options for sharing backend code, visit James Hibbard’s online backend code sandbox summary.

If you would rather host your own online development environment, check out ICEcoder and refer to SitePoint's tutorial on Editing Code in Browser with ICEcoder.

If you want something similar but would rather not be online when dealing with your code, check out Web Maker and refer to SitePoint's tutorial on "Web Maker, an offline, browser-based CodePen alternative" .

I wish you a happy coding!

FAQs about the best code sandbox and CodePen alternatives

What key features are looking for in the code sandbox?

When selecting a code sandbox, several key features need to be considered. First, it should support the language you are using. Most code sandboxes support HTML, CSS, and JavaScript, but if you are using other languages ​​like Python or Ruby, you need to find a platform that supports them. Second, it should have an easy-to-use interface for easy writing and testing of code. Third, it should allow you to save and share your work. This is especially important if you collaborate with others or want to present your project. Finally, consider whether the platform has a community where you can share ideas and get feedback.

How to use code sandbox to improve my coding skills?

Code sandbox is an excellent tool to improve coding skills. They provide a safe environment where you can experiment with different coding techniques and view results in real time. You can also use them to practice solving problems by creating your own project or coding challenges. Many code sandboxes also have a community where you can learn from other users and get feedback on your work.

Is there a free code sandbox available?

Yes, there are a lot of free code sandboxes available. Some of the most popular ones include CodePen, JSFiddle, and Repl.it. These platforms provide a range of features to write and test code, and they also have a community where you can share your work and learn from others. However, remember that while these platforms are free to use, they may offer premium features on a paid basis.

Can I use code sandbox for collaborative projects?

Of course! Many code sandboxes provide easy collaboration with others. For example, you can share your project with others and invite them to contribute. Some platforms also provide real-time collaboration, allowing multiple users to process the same project at the same time. This may be a great way to get help with a team project or code.

How safe is the code sandbox?

The security of code sandbox varies from platform to platform. Most reputable platforms take steps to protect your code and personal information. However, remember that any code you share publicly can be seen and used by others. If you are working on sensitive projects, you may want to consider using a private repository or a platform that provides a private coding space.

Can I use code sandbox to build portfolios?

Yes, code sandbox is an excellent tool for building portfolios. You can use them to create and present your projects, showing your coding skills to potential employers or clients. Many platforms also allow you to share your projects with others, giving you the opportunity to get feedback and improve your work.

What are some alternatives to CodePen?

CodePen has several alternatives, including JSFiddle, Repl.it, and Glitch. These platforms offer similar features to CodePen, such as support for multiple languages, an easy-to-use interface, and the ability to save and share your work. They also have a community where you can share ideas and get feedback.

Can I use the code sandbox offline?

Some code sandboxes provide offline functionality that allows you to write and test code without an internet connection. However, not all platforms offer this feature. If you need offline coding, you may want to consider using a local development environment instead.

Can I use code sandbox on my mobile device?

Yes, many code sandboxes are mobile-friendly and can be used on smartphones and tablets. This can be a great way to code or practice your skills anytime, anywhere. However, remember that coding on a mobile device may not be as comfortable or efficient as coding on a large screen.

How can I get help if I have coding issues in the code sandbox?

Many code sandboxes have communities where you can seek help and get feedback on your code. You can also use online resources like Stack Overflow or coding forums to ask questions and find solutions to your problems. In addition, some platforms also provide tutorials and guides that can help you learn new concepts and techniques.

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