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Jopiggy's Awesome Site

Free online tools that respect your privacy. No sign-up, no tracking, no hassle.

  • ✅ Free & no registration required
  • 🔒 All processing runs in your browser — nothing is sent to our server
  • 📱 Responsive design works on desktop, tablet, and mobile
  • 🌍 Available in English, 繁體中文, and 日本語

Why I Built These Tools

As a backend engineer, I often needed quick, reliable online tools for everyday tasks — generating secure passwords, timing my workouts, or running fair giveaways on stream. But most existing tools were bloated with ads, required sign-ups, or sent my data to unknown servers. So I decided to build my own. Every tool on this site runs entirely in your browser. Your data never touches our servers. There are no accounts, no tracking cookies, and no hidden agendas. Just clean, functional tools that do what they say.

Tool Categories

🔒

Security & Passwords

Generate cryptographically secure random passwords with customizable length, character types, and ambiguous character exclusion. All processing stays in your browser.

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⏰

Time & Productivity

Accurate Taiwan Standard Time clock with NTP synchronization, and a multi-mode stopwatch with lap timing, record tracking, and speedcubing support.

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🎲

Random & Giveaways

Physics-based marble race simulator for streamers, raffles, and team drawings. Powered by Box2D physics for verifiably fair random outcomes.

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🎮

Fun & Testing

Test your reflexes with three modes: lightning reflex, aim strike, and dual choice decision-making. Track your reaction time and compare with averages.

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Frequently Asked Questions

Are these tools really free? ▼
Yes — completely free, forever. There are no premium tiers, hidden paywalls, or usage limits. All tools are fully functional without any payment or registration.
Do you collect my data? ▼
No. All tool processing happens in your browser using client-side JavaScript. Your inputs, generated passwords, timer data, and test results never leave your device. We do not use tracking cookies or sell user data. The only data we collect is anonymized page view statistics via Google Analytics to understand which tools are most useful.
Can I use these tools on my phone? ▼
Yes. All tools are built with responsive design and work on iOS Safari, Android Chrome, and any modern mobile browser. Touch interactions are optimized for mobile use.
Do I need an internet connection to use them? ▼
You need an internet connection to load the page initially. Once loaded, most tools (password generator, stopwatch, reaction test) can continue functioning offline since all logic runs client-side. Tools that require NTP time sync (Taiwan Clock) need periodic connectivity.
How do you make money if everything is free? ▼
This site is a personal project built to solve real problems. It currently displays non-intrusive Google AdSense ads to cover hosting and domain costs. If the site grows, I plan to add optional donation support — but all tools will always remain free and open.

About the Author

Hi, I'm Jopiggy (啾豬) — a backend engineer based in Taichung, Taiwan. I build practical tools that solve real problems, with a focus on privacy, performance, and clean design. When I'm not coding, you'll find me exploring local food spots or working on my next side project.

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Latest Tools

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Reaction Test

Reaction Test

Free online reaction test with 3 modes: Lightning Reflex (click when green), Aim Strike (target practice), and Dual Choice (decision speed). Test your reflexes now.

Games
Online Stopwatch

Online Stopwatch

Free online stopwatch with 4 modes: Simple mode (start/pause/quick restart), Record mode (top 3 best times), Loop mode (lap timing with fastest/slowest marks), Cube mode (hold-release start like csTimer). Fullscreen, millisecond precision, keyboard shortcuts. Ideal for running, cooking, lab work, and speedcubing.

Time & Date
Online Marble Race Simulator

Online Marble Race Simulator

A browser-based Box2D marble run simulator. Features Race & Battle Royale survival modes with multiple maps. No download required. The best visual tool for Twitch/YouTube giveaways, raffles, and random decision making.

Lottery