Internet Speed Test - Decky Plugin

Internet speed test plugin for Decky Loader on Steam Deck / SteamOS.

Measures download speed, upload speed, ping, and jitter using Cloudflare's global edge network — the same methodology used by speed.cloudflare.com.

Features

• Real-time download and upload speed measurement with live SVG charts
• Ping and jitter measurement (20 samples, median)
• Progressive test sizes following Cloudflare's methodology (90th percentile)
• Cloudflare edge server location display
• Test history (last 5 results, persisted to disk)
• Collapsible history section
• Gamepad-navigable UI using native Steam Deck components
• No external dependencies — runs entirely in the browser

Installation

Via Decky Loader (Manual Install)

1. Download the latest release
2. Extract to ~/homebrew/plugins/
3. Restart Decky Loader

From Source

git clone https://github.com/Dev-ManishTomar/decky-internet-speed-test.git
cd decky-internet-speed-test
pnpm i
pnpm run build

Development

Requirements

• Node.js v16.14+
• pnpm v9+

Deploy to Steam Deck

1. Enable SSH on your Deck: sudo systemctl enable --now sshd
2. Copy .env.deck.example to .env.deck and set your Deck's IP
3. Deploy:

./deploy.sh              # Build + deploy (auto-reloads in Game Mode)
./deploy.sh --watch      # Auto-deploy on every file change
./deploy.sh --logs       # Tail backend Python logs
./deploy.sh --restart    # Deploy + restart Steam

Architecture

• Frontend (TypeScript/React): Speed test engine runs entirely in the browser using fetch() against Cloudflare's __down/__up endpoints. Real-time SVG charts built with smooth Catmull-Rom curves.
• Backend (Python): Minimal — only handles test history persistence to disk.

License

BSD-3-Clause