What I Build
Production-Ready Tools
Tools Used by Developers Worldwide
Clipboard Image Downloader - Paste & Save as PNG
Paste any image from your clipboard (Ctrl+V / Cmd+V) and download it instantly as a PNG. Runs entirely in your browser - no upload, no account, no server.
Bookmark Link Checker - Find Broken Links in Your Bookmarks
Upload your browser bookmark HTML file and instantly check every link for broken URLs, redirects, and timeouts. Supports Chrome, Firefox, Safari, and Edge. Export results to CSV, JSON, TXT, or HTML.
Twitter Video Downloader
Free online Twitter (X) video downloader. Save Twitter videos and GIFs in high-quality HD MP4 format for offline viewing without software.
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Latest Engineering Articles
Discover how to use `pyproject.toml` to create, manage, and distribute Python packages in 2026. This comprehensive guide covers everything from build systems to dependency management and best practices for modern Python development.
Learn how to use the `__main__.py` file to make your Python packages executable. This guide covers the purpose of `__main__.py`, how it differs from `__init__.py`, and best practices for creating command-line interfaces in 2026.
A comprehensive guide to `__init__.py` in Python packages. Learn its core purpose, the hoisting pattern, package security with __all__, namespace packages, and 2026 best practices.
About Serhii Hrekov
I'm a Senior Software Engineer & System Architect specializing in Python, high-performance web backends, and cloud infrastructure (AWS, GCP). Currently working at nCube and Modigie, I created this platform to document real-world engineering solutions, production APIs, and developer tools.