I started to figure out how to work with these libraries and found Phaser to be a favourite amongst them. Working with Phaser was straightforward enough when I had access to my own system and tools, but if I was away from home and had downtime to tinker, I struggled to access those resources reliably. That is when I discovered cloud IDEs.
The good news is that the available options can be great. The bad news? They're not all made equal when it comes to game development specifically. Let's go through them.
A quick note before we start...
Phaser is a JavaScript game framework that can handle 2D and 3D games in the browser, which means it plays nicely with online IDEs in a way that, say, a Python web server or a compiled language wouldn't. You can load Phaser from a CDN with a single script tag and have a running game in minutes. Of course, as with everything, game development has some specific needs -- asset loading, a live preview that actually runs your game loop, and enough horsepower to handle WebGL that not every online IDE handles gracefully. It is worth keeping that in mind as we look at some of the offerings.
The Phaser Sandbox (phaser.io/sandbox)
This one's worth leading with because it's Phaser's own official online editor, and most people don't know it exists.
The Phaser Sandbox is a free, browser-based code editor built specifically for Phaser. It runs directly on the Phaser website and comes pre-loaded with the latest version of Phaser -- currently updated for Phaser 4 -- so there's nothing to configure. You open it, you write code, your game runs in a preview panel. That's it.
It's genuinely the fastest way to try something out. Testing a new mechanic, following along with a tutorial, sharing a bug reproduction with someone -- the Sandbox is perfect for all of that. You can save your work and share a link, which makes it especially useful for the Phaser community forums and Discord when you want to show someone what you're working on.
The limits are also real though. This is a single-file editor. You're not managing a project with multiple scenes, separate asset files, or a proper folder structure. For anything beyond a self-contained example, you'll run into walls.
Best for: Quick experiments, trying out the API, following tutorials, sharing examples with the community.
Not great for: Actual game projects with multiple files and assets.
Cost: Free.
Phaser Editor (phaser.io/editor)
This is the serious Phaser-specific tool and it deserves its own section.
Phaser Editor is a dedicated visual IDE for building Phaser games. Version 5 just launched in 2026 with full Phaser 4 support, and it's a significant piece of software. The headline feature is the Scene Editor -- a visual layout tool where you drag game objects onto a canvas, set their properties, and the editor generates the corresponding Phaser source code for you. For anyone who has ever manually calculated pixel positions or wrestled with object configuration, this is a meaningful time save.
It also includes a visual animation editor, an asset pack tool, prefab support for creating reusable objects and behaviors, and -- as of v5 -- built-in AI chat. You can bring your own API key for Claude, Gemini, or GPT and ask the editor to help write or explain code, which is a thoughtful integration given how well Phaser's API is understood by current language models.
The technical side: Phaser Editor runs as a web-based IDE with a small backend server. You can run that server locally, on a private server, or use the cloud version at play.phasereditor2d.com. The cloud version has some limitations and is described as best suited for existing license holders, but it gets you up and running without installing anything.
It is worth noting that Phaser Editor is an independent product -- it's made by Arian Fornaris and the Phaser Editor 2D team, not by Phaser Studio. The two projects work closely together and follow the same standards, but they're separate things.
Best for: Serious Phaser game development, visual scene layout, projects that will grow beyond a handful of scenes.
Not great for: Casual experimentation where the Sandbox is faster to reach.
Cost: Paid (free trial available). The cloud version has a limited free tier.
CodePen (codepen.io)
CodePen is a long-standing favourite for front-end web experiments and it works fine for Phaser. You add the Phaser CDN link in the JS settings, write your game code in the JS panel, and the preview updates automatically. There's a healthy library of Phaser examples already on CodePen if you search for them.
Where it fits well is quick, self-contained demos -- the same territory as the Phaser Sandbox, honestly, though CodePen has a bigger general community and is more likely to be where someone shares JavaScript projects that aren't specifically Phaser-focused. If you're writing a blog post or tutorial and want to embed a live runnable example, a CodePen is a reasonable choice.
The limitations mirror the Sandbox: single-file editing, no project structure, asset loading can get awkward because you're hosting images somewhere else (usually linking to raw GitHub URLs or an image host). For anything beyond a small demo, it starts to feel constrained.
Best for: Sharing demos, embedding examples in tutorials, showing off simple effects.
Not great for: Multi-file game projects, managing game assets.
Cost: Free tier is generous. Pro plans add features like private pens and more storage.
StackBlitz (stackblitz.com)
StackBlitz is interesting for Phaser because it runs Node.js inside the browser via WebContainers, which means you can use a proper build setup -- Vite, for instance -- without any remote server. Phaser's official project templates support Vite, so you can actually work with a real development setup entirely in the browser.
The experience is close to VS Code. You get a file tree, multiple files, a terminal panel, and a live preview. For a Phaser project of any real size, this is meaningfully better than CodePen or the Sandbox. You can structure your code properly, separate your scenes into different files, and work the way you'd work locally.
The trade-off is that WebContainers, while clever, have some constraints. Very large asset files or complex native dependencies can cause issues. But for pure JavaScript/TypeScript Phaser development with a Vite or Webpack setup, it works well. Several Phaser templates and examples live on StackBlitz specifically because of how well it handles this use case.
Best for: Multi-file Phaser projects in the browser, using build tools like Vite, TypeScript development.
Not great for: Projects with heavy native dependencies or very large asset bundles.
Cost: Free for public projects. Paid plans from $9/month.
Replit (replit.com)
Replit is the easiest to start with if you're completely new to all of this. Create a project, pick an HTML template, drop in a Phaser CDN link, start writing. The AI Agent can even scaffold a basic Phaser project for you from a description, which is genuinely useful if you're not sure how to structure things.
For learning Phaser, Replit is a comfortable environment. The live preview, the ability to share your project with a link, and the lack of any setup friction all work in its favour. The collaboration features are also good -- if you're learning alongside someone else or want a teacher to look at your code, sharing a Replit is seamless.
For production work or complex projects, Replit starts showing limits. The compute on the free plan is capped, the editor isn't as capable as VS Code, and there's some proprietary lock-in to Replit's deployment platform if you go that route. But as a place to learn the Phaser API and build small games, it's a solid choice.
Best for: Learning Phaser, beginners, quick prototypes, collaborative learning.
Not great for: Large or complex game projects, production deployment.
Cost: Free tier available. Hacker plan at $7/month, Core at $20/month.
So, which one?
If you're just starting with Phaser: use the Phaser Sandbox. It's already loaded with the version of Phaser you want and there's nothing to figure out. When you outgrow it, you'll know.
If you want to build a real game online: look at StackBlitz for code-first projects, or Phaser Editor if you want visual tools and a proper development environment. Phaser Editor is the more complete answer for serious game development -- the Scene Editor alone saves a lot of work.
If you're learning alongside tutorials or sharing your work: CodePen and Replit are both comfortable options. CodePen is better for embedding examples; Replit is better for collaborative learning.
The Phaser Sandbox and Phaser Editor are the two tools built specifically for this framework, and they're worth knowing about. Everything else is a general-purpose environment that happens to support JavaScript -- which Phaser is, so they all technically work, but that's a different thing from being designed for it.
