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I am an engineering student pursuing a degree in Artificial Intelligence and Data Science at Datta Meghe College of Engineering. I have strong technical skills in Full Stack Web Development, as well as programming in Python and Java. I currently manage Doubtly's blog and am exploring job opportunities as an SDE. I am passionate about learning new technologies and contributing to the tech community.
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If you’ve ever wanted to build and test your Flutter Web app directly in the cloud, without installing anything locally — GitHub Codespaces is your best friend.
Codespaces gives you a full VS Code + Ubuntu dev environment inside your browser.
With a few simple commands, you can run Flutter Web live inside Codespaces, preview your app instantly, and even share it with others.
In this guide, we’ll cover:
✅ How to install Flutter in GitHub Codespaces
⚙️ How to enable Flutter Web
🌐 How to run your Flutter app in the browser
🧰 Common issues and their fixes
💡 Pro tips for developers
By the end, your Flutter web app will be running live in Codespaces with hot reload — no emulator, no setup pain.
Go to your Flutter project’s GitHub repo.
Click the “Code” → “Create codespace on main” button.
Wait for it to open — you’ll now be inside a Linux + VS Code dev environment.
Once your terminal is ready, we’ll install Flutter.
Inside your Codespace, create a file named:
setup_flutter_web.sh
Paste this script:
#!/usr/bin/env bash
# setup_flutter_web.sh — Setup Flutter Web in GitHub Codespaces
set -euo pipefail
PROJECT_DIR="${1:-.}"
FLUTTER_INSTALL_DIR="/usr/local/flutter"
FLUTTER_CHANNEL="stable"
WEB_PORT=8080
WEB_HOST="0.0.0.0"
echo "=== Installing dependencies ==="
sudo apt-get update -y
sudo apt-get install -y curl git unzip xz-utils zip libglu1-mesa openjdk-17-jdk ca-certificates
echo "=== Cloning Flutter SDK (stable channel) ==="
if [ ! -d "$FLUTTER_INSTALL_DIR" ]; then
sudo git clone https://github.com/flutter/flutter.git -b $FLUTTER_CHANNEL $FLUTTER_INSTALL_DIR
else
echo "Flutter already installed at $FLUTTER_INSTALL_DIR"
fi
echo "=== Adding Flutter to PATH ==="
export PATH="$PATH:$FLUTTER_INSTALL_DIR/bin"
echo "=== Checking Flutter doctor ==="
flutter doctor -v || true
echo "=== Enabling Flutter Web ==="
flutter config --enable-web
echo "=== Running flutter pub get ==="
cd "$PROJECT_DIR"
flutter pub get
echo "✅ Setup complete!"
echo ""
echo "Run your app with:"
echo "flutter run -d web-server --web-hostname=0.0.0.0 --web-port=8080"
Now make it executable:
chmod +x setup_flutter_web.sh
Run this command inside your Codespace terminal:
./setup_flutter_web.sh
This will:
Install Flutter SDK
Add it to your PATH
Enable Flutter Web support
Run flutter pub get
Print the final “run” command
Once setup is done, start your web server:
flutter run -d web-server --web-hostname=0.0.0.0 --web-port=8080
Now open the Ports tab in GitHub Codespaces —
You’ll see 8080 listed → click “Open in Browser” 🚀
Boom 💥 — your Flutter app is running live in the browser!
No.
GitHub Codespaces doesn’t support GUI or virtualization.
You can only use Flutter Web or connect to a remote device.
For most UI development, Flutter Web is perfect.
flutter doctor?Some warnings (like Android SDK missing) are safe to ignore when working with Flutter Web.
As long as “Chrome” or “Web Server” shows in flutter devices, you’re good.
Hot reload works perfectly when using:
flutter run -d web-server
Simply hit “r” in terminal or click the 🔁 button in VS Code.
Codespaces environments reset on rebuild.
To make Flutter persistent:
Add the script inside .devcontainer/
Add "postCreateCommand": "./setup_flutter_web.sh" in .devcontainer/devcontainer.json
This way, Flutter installs automatically when Codespace starts.
You can verify your setup using:
flutter doctor -v
flutter devices
flutter --version
You should see:
✅ Flutter version (stable)
✅ Web Server / Chrome device
✅ No critical issues
| Task | Command |
| Update Flutter | flutter upgrade |
| Clean build | flutter clean |
| Build web release | flutter build web |
| Run with Chrome | flutter run -d chrome --web-port=8080 |
| List devices | flutter devices |
You might have forgotten to export the path.
Run:
export PATH="$PATH:/usr/local/flutter/bin"
Run the script with:
sudo ./setup_flutter_web.sh
Run:
flutter config --enable-web
flutter devices
You’ve just learned how to set up Flutter Web inside GitHub Codespaces —
no local SDK, no emulator, no setup headaches.
This setup is perfect for:
Solo developers building Flutter Web apps
Teams collaborating remotely
CI/CD or quick demos of UI prototypes
Once you get this running, Codespaces becomes your cloud Flutter dev machine — accessible from anywhere.
# Step 1: Create Codespace
# Step 2: Run setup script
bash <(curl -sSL https://gist.githubusercontent.com/Ajinkgupta/dd45476b5de754b6ed3a9ddba9edb33f/raw/70e8ef759097805d391b8af409caa7f8ce3a6dfa/setup.sh)
# Step 3: Run Flutter Web
flutter run -d web-server --web-hostname=0.0.0.0 --web-port=8080