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GemShell - Desktop Packer for Webgames. Ditch the Bloat.

A topic by spageddis created Oct 21, 2025 Views: 378 Replies: 5
Viewing posts 1 to 6


For Indie Devs & Game Jammers: Transform your HTML5 webgames into lightning-fast desktop applications with GemShell's one-click export. Skip Electron's 200MB bloat - create lean packages that launch instantly. Works with any HTML5 engine (Godot, Unity WebGL, GameMaker, Gdevelop, Phaser, Construct, and many more).

https://l0om.itch.io/gemshell

(2 edits)

https://l0om.itch.io/gemshell/devlog/1098889/gemshell-v005-instant-game-loading-

GemShell v0.0.5 - 95% Faster Loading!

Your games now load 80-95% faster after the first run thanks to Service Worker integration!

Performance Stats:

- Before: 2-5 seconds
- After: 0.1-0.5 seconds  
- Speed Boost: 95%

What's New:

- Full offline support - play without internet
- Automatic caching - instant startup
- Auto-update detection - seamless updates

Bug Fixes:

- Fixed build progress percentages (no more 37.688235294117646%)
- Cleaner build logs

Improvements:

- Asset Compression and Code Minifier is safe but much more aggressive

---

Version History

v0.0.4 - Service Worker Foundation

- Service Worker for offline gaming
- Seamless updates

v0.0.3 - Pro Features & Polish

New Features:

- Custom App Icons (1024x1024 PNG)
- Fullscreen Toggle (CMD+F / F11)
- Performance Mode (144+ FPS, V-Sync off)
- Persistent Settings
- FPS calculating with delta instead seconds for FPS-Graph

Bug Fixes:

- Fixed Windows builds not working
- Fixed Linux/Debian binary
- macOS Code Signing (instant startup)
- Fixed Phaser 3 keyboard input
- Fixed localStorage data loss on title changes
- Removed system beep sounds
- Fixed size estimations

Cross-Platform:

- macOS notarization support
- Universal keyboard handling
- Stable port system (Save/Load Data)

v0.0.2 - Compression & Optimization

New Features:

- Asset Compression (15-25% smaller)
- Code Minification (HTML 50-70%, CSS 50-70%, JS 25-40%)
- Duplicate Asset Detection
- Preload Critical Assets (30-50% faster start)
- Remove Console Logs

Improvements:

- itch.io Butler integration
- x64 builds only (better stability)

Bug Fixes:

- Fixed macOS duplicate .app bundles
- Transparent wrapper background

v0.0.1 - Initial Release

Core Features:

- Universal HTML5 game wrapper
- Multi-platform (Windows, macOS, Linux)
- Customizable window settings
- Single-file executables
- Build export for all platforms
- Developer tools with FPS graph

Game Engine Tested:

GDevelop, Phaser 3, Kaplay, Construct, Three.js, PixiJS, LittleJS, and more!

---

Download GemShell Now

Build your HTML5 games for desktop in seconds!

https://l0om.itch.io/gemshell

really awesome software imo for an acceptable price, and i would buy it instantly, but i'd need to convert normal html to an exe, any chance this could be added. It would be wort up to 20 for me honestly :) However great app and if this can't be done i certainly understand, and im working my way towards creating web game based on html5, but there is still a way to go (learning how to :D), but if you'Re app then still is available i'll buy it:) keep up the great work....i followed you :) id be deeply happy if you'd consider checking my  site as well, thou i dont engage with software creation, rather games, ive created 7 3dfps shooters since 2023, maybe you come to find them nice (maybe) a follow back would mean the world to me :)

best regards, love and peace <3


Hey, nice to see you here. You can easily pack a normal html into an exe :-) just try it out!

Now you can see GemShell in JSLegendDev's Youtube Video!

New big major Update is here!

https://l0om.itch.io/gemshell/devlog/1131890/beta-051-steamworks-native-apis-are...