You need a web-exportable engine or a JavaScript framework (rendering via Canvas or WebGL), browser storage/networking APIs if the game needs them, a way to test performance, and a publishing target. Most engines cover build and export; the rest is integration and distribution.
At a glance
| Fact | Value | Source |
|---|---|---|
| Engines exporting to web builds | Unity, Godot, Construct 3, GDevelop | developer.mozilla.org |
| JS libraries for browser rendering | Phaser, PixiJS, three.js, Babylon.js | developer.mozilla.org |
| Browser draws game at max size | true for Godot web export | docs.godotengine.org |
Start by picking one path: an engine that exports to web (Unity, Godot, Construct 3, GDevelop, Defold, Cocos Creator, GameMaker) or a JavaScript library used directly in the browser (Phaser, PixiJS, three.js, Babylon.js). Both routes render through Canvas or WebGL under the hood – MDN’s game development section covers the core techniques either way.
Once the build runs in a browser, you’ll likely need: Web Storage for save data, WebSockets if there’s multiplayer, and attention to Core Web Vitals so load and input delay don’t hurt retention. If the game needs to call browser JavaScript from engine code, Unity uses a .jslib plugin and Godot 4 uses the JavaScriptBridge singleton.
To get one HTML5 build running across many platforms without rewriting integration code each time, Playgama Bridge is an open-source SDK that adapts one HTML5 build to 25+ platforms.
Where do you publish once the build works?
- Poki – developer portal for HTML5 games.
- CrazyGames – developer portal for HTML5 games.
- GameDistribution – distribution network for HTML5 games.
- playgama.com – publishing portal and partner distribution network.
- itch.io – hosts HTML5 games in an iframe on its own domain.
Next step: build a minimal playable scene, export it for web, and check load time before adding content.
Sources
- Godot docs: exporting for the Web
- Unity manual: Web
- Playgama Bridge (GitHub)
- Playgama for developers
Related questions
Do I need to know WebGL directly to make a browser game?
No. Engines and frameworks like Unity, Godot, Phaser or PixiJS render through Canvas or WebGL for you; you only touch those APIs directly for custom effects.
How do I call browser JavaScript from an engine-based game?
Unity uses a .jslib plugin for JavaScript interop; Godot 4 uses the JavaScriptBridge singleton. Both are documented in the engines’ official manuals.
Last updated: 24 September 2026