9 Best Online IDE and Code Editors to Develop Web Applications

What’s the next best thing to coding? The code editor, of course!

Code editors are the second most significant reason for programmer flame wars (the first one being code formatting).

To some, Vim is the only sensible editor ever created, while to others everything that doesn’t fit the Inception-like spirally head-spinning world of Emacs is only fit for ridicule. If you’re badly looking for attention, all you need to do is go to a programming community and start a thread like “Why I think X (pick any popular code editor) sucks/is the best,” grab some beer and relax.

Arguments, counter-arguments, and insults will keep pouring into and out of the discussion all night long, and it will take many months before the venom in the thread will cool off.

The question is: why?

Sure, human beings manage to make a big deal out of everything, but I think code editors are particular when it comes to programmers. A typical programmer spends almost all of their time (More than 98%, if I were to wager) on the code editor of choice. They know their way around the editor — its strengths, weaknesses, limits, quirks, and hidden gems.

Nothing is more frustrating than having to struggle with the editor when you’re writing code (think of how annoying it is when you’ve got to shoot off a lengthy and urgent email on a new keyboard!). Code editors reduce mental friction and allow you to be more productive, which is why they’re so important and get so much attention.

So, which is the best code editor?

Honestly, I won’t even dare to go there! 😀 😀

However, if you’re into Web development, there’s an alternative I want you to think about — online code editors! You can also call them cloud-based code editors.

Don’t confuse code editor with an integrated development environment (IDE). Both are two different things and as a developer, you should be familiar with these.

In a nutshell, these are editors that reside entirely on a remote server and are accessible via the browser.

Sounds weird, right?

I felt so too when I came across them 3-4 years ago. Why in the hell should someone want to hand over everything to a stupid browser?

Can it even compete with a natively installed code editor?

Turns that in most cases, and especially for Web development, the answer is yes. Now, while I haven’t embraced online editors as my primary medium, I do find myself using them more and more in specific scenarios.

Before we dive into which code editors are out there to be used, let’s pause and think about when online code editors can make sense.

Zero setup

I don’t know about you, but setting up my favorite editor to my liking on a new system isn’t something I look forward to. Plugins, themes, fonts, shortcuts, snippets, settings . . . There’s an endless list of things that must be balanced before the whole thing becomes usable. It’s easy to overlook something, only to get annoyed later on when your workflow is interrupted.

By contrast, there’s nothing to do with an online editor once the first setup is over. Official builds, updates, nightly builds, supported platforms, system architecture, FTP sync,— none of that matters as long as you have a browser!


More often than not, you need towith other developers when working out problems or debugging something.

The traditional code editor isn’t built for this — there’s no scope for simultaneous code editing, commenting, or highlighting, and it’s challenging to add support for it.

Data safety

Now, it’s a given that no project today is without version control, which means a copy of the code exists on the repository at all times. That said, there are times when version control is not enough:

  • You forget to push newly created commits, and your laptop catches fire.
  • You have other important files and data dumps that your code interacts with, though these are not part of the live application. What happens to them if your laptop catches fire?

(Okay, it looks like I’m obsessed with notebooks catching fire, but you get the point, right?!)

Enforcing discipline

This might as well be argued against in the court of developer rights (if such a thing exists), but the truth of the matter is that developers rarely sacrifice their whims for the common good.

For instance, a hardcore Sublime Text enthusiast will ever fully embrace any of the JetBrains’ excellent editors and will find every opportunity to point at its memory-hungry nature and slower performance.

The same goes for tabs vs. spaces (or even two-space tabs vs. four-space tabs) — you’re naive if you think that the programmers on your team will not lock horns.

In such cases, an online editor is a boon — you decide the settings for projects (even how the code should be formatted), and it will simply refuse to accept work until it adheres to all the standards. Harsh on the individual, perhaps, but great for the project!

By now, I’m running out of use cases, so let’s dash off to what option do we have when it comes to online code editors, especially for Web development.


Whilecan’t replace a full-fledged text editor, it does a damn good job of handling one-off frontend scripts.

It’s so popular that Q&A sites like StackOverflow already support the embedding of JSFiddle links directly in their platform.

To get things started quickly, JSFiddle offers some boilerplates at the start; which means if you want to get a demo of, say, React, started, all you need to do is click the relevant button and start writing the code. Once you hit Save, the “fiddle” gets saved you get a permanent URL (Check out this silly fiddle I created: and note that you can make your changes and press Save to create a new version of this URL).

Here’s what makes JSFiddle a viable platform for front-end web development:

  • Free to use (no hidden fee or freemium features). JSFiddle supports itself through ads (at least as of writing), and you can see an Adobe ad in the lower left of the screenshot above.
  • Code collaboration features — ideal for building concepts together, interviews, etc.
  • Multiple layouts, font sizes, light/dark themes, etc.
  • Code formatting (tidying), upcoming support for linters (CSS and JS), and more.

And now, sob, sob, for the bad stuff:

  • JSFiddle is a purely front-end editor. There’s no way to code and run your favorite backend language.
  • There’s no concept of files and folders here (or uploads, for that matter). All you have is a single space for code, no matter how much of it there is.
  • JSFiddle cannot be used to host code on your server. The code has to be on JSFiddle and is public all the time.
  • There’s no way to build a CI/CD pipeline, use Git, etc.

That said, JSFiddle has its sweet spot and shines when you need to dish out proofs-of-concept and collaborate at the speed of light. It is and will remain a major identity among online editors.


can be thought of as a much more powerful and complete take on JSFiddle. True to its name, CodeSandbox provides a complete code editor experience and a sandboxed environment for front-end development.

CodeSandbox is a real powerhouse and sweet, sweet product. I’d run out of paper if I try to list down all its advantages, but here are some killer features:

  • Npm support: Yes, you can add pretty much any package that is available on npm.
  • Files, folders, modules: You can split your code into multiple files, add/remove images from the public folder, and build/import modules as you see fit. The workflow mirrors that of a modern module bundler, so you don’t need to set up (almost) anything.
  • Support for TypeScript, hot reloading, GitHub export, static file hosting, etc.
  • It is built on Monaco editor, the same beast that powers the favoriteeditor. This brings powerful features like “Go To,” “Find References,” and necessary refactoring to your fingertips!
  • Snippet support for
  • Integrated DevTools, linting, error overlays, testing frameworks (Jest), keybindings, and more.
  • Powerful CLI to directly import local projects into CodeSandbox.

While the free version of CodeSandbox doesn’t support private code, you can get that feature (and increase size limits overall) by helping them onfor as little as $5 a month (pay what you want, up to $50 a month).


One problem with most of the code editors on this list (at least so far) is that they expect you to keep the code on their servers at all times, or require you to sync code via the command line regularly.

Not so with.

At its strongest, CodeAnywhere has two features that stand out for me:

  • Prebuilt container images for 72+ programming languages and frameworks. This means you can provision a new development environment right from within the editor! Of course, the code automatically gets hosted on the newly created container, and files get served directly from there.
  • Connect to anything. Yes, literally anything. You’re not obliged to store your code on CodeAnywhere’s servers. Whether your code resides on FTP, file sharing platforms like Dropbox, Amazon S3, or on sophisticated version control platforms like GitHub, you can easily set up CodeAnywhere to read from and write to that source, using the code editor purely for . . . Well, code editing. 😛

One more thing I feel like pointing out: if you’re not comfortable with Git when it comes to viewing history and differences, CodeAnywhere might feel like a sigh of relief. The editor uses its diff system for comparing files, which allows you to compare two files across any two revisions (a revision is created every time you save a file).

There’s a slight catch with revisions, though — the free version allows you to maintain only one revision, while the smallest paid plan allows 20 revisions at most. Generally speaking, it’s not a problem as you rarely want to look beyond the last 20th revision, but since most programmers have a habit of hitting Save a few times a minute, it can become painful.

All said and done, CodeAnywhere is a solid, pleasant offering for those who want to move to the cloud and stay there. 🙂 Since its powers span beyond front-end code, in my opinion, it’s highly recommended!


If you’re into front-end mostly and cannot move away from the VSCode interface,was created just for you.

See nothing special?

I didn’t too until I scrolled down a little and clicked on the Angular button. Boom!

Guess what, that’s not deliberately created to look like VSCode — it’s built on the VSCode editor! So much so, that you can install extensions, search through the folders, and organize files just the way you’d expect from a regular VSCode instance.

But, wait, there’s more!

You might or might not have noticed that:

  • All applications created on StackBlitz also get deployed automatically on their servers! So, this Angular toy app I just created is hosted automatically on Most likely, the URL is still working (will load slowly, though, as you’d expect when hosted for free)!
  • You can fork and share the project. While sharing, you get finer control over what others can do.
  • You can connect to a GitHub repository and also let code be directly pulled/pushed from there. Or you can simply download the project as a zip file in the good ol’ way.

But, wait, there’s more!

Seriously! 😀

Here’s the list of official features offered by StackBlitz:

  • Native support for Firebase (which is something I don’t personally use, but hey, it’s a boon for those not wanting to dive into the murky depths of the backend)
  • Intellisense, Project Search
  • Hot reloading as you type
  • Import npm packages
  • Edit offline when not connected!

StackBlitz is full of (beautiful) surprises when it comes to taking the hurdles away from Web development and deployment. Embedding VSCode into your website isn’t the stuff of dreams anymore!

AWS Cloud9

was arguably the first browser-based IDE that offered serious features and took the idea of browser-as-an-editor mainstream. No wonder that Amazon later acquired it, and today, Cloud9 is part of the AWS offerings.

If you’re even remotely attached to (or interested in) the AWS platform, Cloud9 is where your search for a perfect (okay, near-perfect) editor ends.

Let’s see why:

  • There are no additional charges for using Cloud9. You can connect Cloud9 to an existing/new AWS compute instance, and you pay only for that instance. It’s also possible to connect to a third-party server over SSH — for exactly no fee! 🙂
  • First-class support for AWS Serverless applications (debugging, etc.)
  • Direct terminal access to AWS from within the editor (honestly, a decent in-editor, the tabbed terminal is what I still miss in VSCode)
  • Over 40 programming languages supported (Go, C++, Ruby, Node, Python, PHP, Java . . . take your pick)

The collaboration features in Cloud9 are also desirable, allowing reviews/interviews to be conducted seamlessly.

Another killer feature is a video-style playback of the changes made to a file, making the process of review a joy:

My advice?

If you’re into AWS, then don’t wait and grab Cloud9 just now. And if you’re not on the cloud yet but have been thinking of making a move, embrace AWS and integrate Cloud9 into your workflow. You can’t make a better decision either way!


is a powerful cloud editor that makes use of Docker containers to let you run pre-configured and isolated dev environments. It’s built on the open-source Eclipse Che cloud IDE and offers a ton of scalability andoptions.

As of writing, CodeEnvy has been acquired by RedHat (which, amusingly, itself has been acquired by IBM!).


is a refreshing take on cloud code editors (or IDEs, if you will) that aims to keep your code always tested and up to date. In other words, it’s deeply integrated with GitHub, and every time you add code, it runs your testing and CI/CD pipelines to make sure code is always at 100% health.

Worth checking out if you love the VSCode experience and want something that supports all major back-end/front-end languages and frameworks (Django, Rails, Revel, you name it).


If you’re a die-hard SOLID fan and a nit-picking software architect, thewill tickle your separation-of-concerns bone. It’s a TypeScript-coded (five points for style straightaway!) code IDE that has a perfectly separate front-end and backend. The front-end runs in a browser, while the backend can be anywhere — local machine or the cloud!

But that’s not all — the front-end can be run as an Electron app with a fully functional, isolated browser environment, giving you the look-and-feel of a native desktop app should you crave it.


Although their website fails to say so clearly,is a VSCode environment bundled in a server that can be run locally or in the cloud. The recommended configuration is to run the IDE as a server in the cloud and access it locally via the browser. There are prebuilt Docker images for zero-hassle setups, and an enterprise plan should you need support or have different needs.


This more or less covers all the IDEs and code editors out there as of writing. I’ve left out two types of offerings in this list: those that are focused purely onand don’t have full-fledged environments (except our beloved classic JSFiddle, of course), and those that didn’t seem to offer something substantial and had little more than a sleek home page.

If you need something lightweight for the web development, you can explore these.