Welcome! I'm

Andrei Rovnyi

I'm aSoftware Developer

I build production-ready web platforms, game systems, automation tools, and AI-assisted workflows — from early product ideas to shipped systems used by real people.

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Open to new projects

Tools

Public tools available for everyone.

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QR Code Generator

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Credit Card Generator

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JWT Decoder

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Image Converter

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How I'm Making an Animated Film with AI: The Story of Tiny Boo

I had wanted to make something of my own — something warm — for a long time.

#animation

5/31/2026

A while ago, while testing another payment integration, I ran into the same annoying problem that every developer eventually faces: finding decent test credit card data.

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#dev

Why I Built a Credit Card Generator Tool for Developers

A while ago, while testing another payment integration, I ran into the same annoying problem that every developer eventually faces: finding decent test credit card data.

5/28/2026

A field-tested tour of the JavaScript traps that bite real codebases — floating-point math, NaN, ==, hoisting, this, references, async/await, and JSON cloning.

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#dev

JavaScript Traps Worth Knowing Before They Bite You

A field-tested tour of the JavaScript traps that bite real codebases — floating-point math, NaN, ==, hoisting, this, references, async/await, and JSON cloning.

5/11/2026

Instagram

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New avatar for few years)

Vietnam is wonderful

Legendary people, legendary hero, legendary place #brucelee #hongkong

Ностальгии пост

После долгого пути из идей, экспериментов, бессонных ночей, сомнений, переписываний, багов, фиксов и тысяч маленьких решений этот момент наконец наступил! Сегодня наша игра официально выходит по всему миру!