ShowDev: I Built a Client-Side Probability Engine for Global Lotteries 🎲📈

Cn Kk — Fri, 14 Aug 2026 07:59:38 +0000

Hey DEV community! 👋

Have you ever looked at lottery numbers and thought, "There has to be a better mathematical approach than just pure Math.random()?" I did. Instead of leaving everything to blind chaos, I wanted to see what happens when you apply real statistical models to number generation.

So, I built SmartLottoGen.

It’s a completely free, browser-based probability engine that analyzes over 60 lottery games across 20+ countries.

🚀 Tech & Architecture (Privacy First)

As developers, we know how intrusive the modern web can be. That's why I designed this tool to be 100% client-side.

Zero Tracking: No databases storing user picks. No server-side processing for the algorithms. Everything happens instantly in the user's browser.
Geo-IP Routing: It uses a simple IP fetch on load to automatically detect your country and present the relevant game pools.
i18n Support: Fully localized into 14 languages.

🧠 The Math Behind It (The Fun Part)

The core of the app isn't just generating random numbers; it allows users to choose between 8 distinct mathematical algorithms to build a rational strategy:

Bell Curve Optimization: Calculates the standard deviation of all possible combination sums and only presents totals that fall on the peak of the Gaussian distribution.
Spatial Matrix: Treats the ticket as a physical Euclidean grid, maximizing the physical distance between selected numbers to prevent visual clumping.
Balanced Distribution: Uses a simple Modulo(2) algorithm to force combinations into a perfect 50/50 Odd/Even split (or the closest possible ratio based on the game format).
Fibonacci Net: Generates numbers using harmonic intervals inspired by the Golden Ratio (1.618) and prime number sets.
Anti-Seq Filter: Specifically blocks consecutive series (like 12, 13, 14) from appearing in the output array.

🎯 Check it out

If you are interested in probability, statistics, or just want to see a clean client-side JS implementation, I'd love for you to try it out and break the algorithms!

🔗 Test the Engine Here: smartlottogen.com

*Let me know what you think of the UI and the math models in the comments! *💻✨

I built a 100% Client-Side PDF & Media Tool using WASM (Zero Server Uploads)

Cn Kk — Wed, 12 Aug 2026 22:14:59 +0000

Hi everyone! 👋

I was getting really frustrated with "free" PDF and image formatting tools that either put a massive watermark on your files, hit you with a paywall after two uses, or worse—force you to upload your highly sensitive documents to their remote servers.

So, I decided to build my own solution: NanoFormatZero.

It's a completely free, serverless utility suite that runs entirely in your browser.

🚀 How it works

Instead of relying on a backend server, NanoFormatZero uses WebAssembly (WASM) and Web Workers to do all the heavy lifting locally in your device's RAM.
Your files literally never leave your computer.

✨ What it can do:

PDF Tools: Compress PDFs by up to 50% without quality loss, merge/split documents, and use an AI-assisted redaction tool to permanently black out sensitive text.
Media Rescue: Convert Apple's HEIC photos to JPG seamlessly, compress WebP, and run local background removal.
Privacy Shield: Completely wipe hidden EXIF data and GPS coordinates from your photos before uploading them anywhere online.

There are no subscriptions, no data collection, and absolutely no limits. I built this to solve my own problems, and I'm hoping it can help some of you too.

I'd love for you to try it out and destroy some PDFs or images! Let me know what you think, any feedback on the UI or performance would be massively appreciated! 🚀