Hi, I'm Jozef - a software developer who builds free tools that people actually use. I recently set up this page as a way for folks to support my work.

You might know me from Xen.pub (a blockchain monitoring tool trusted by thousands every month), ScrabbleDB (a word solver that's helps thousands find that perfect play), UsenetArchives (where I'm preserving over 800 million posts from internet history), WenXen (portfolio tracker) or ChromeBoard (a searchable directory of 250K+ Chrome extensions). Then there are also the smaller sites like drawio2visio.com, tetrissolver.com, microdosingcalculator.com and honestly more than I can list here.

Every single one of these is free to use. No paywalls, no premium tiers, just tools that work, hosted on my own servers and supported by the occasional ad at most.

If something I've built saved you time, helped you solve a problem, or even just made your day a little easier, a coffee would genuinely mean a lot. It goes directly toward keeping the servers running and the tools online for everyone.

And if you'd like to go a step further, a monthly membership is one of the most impactful ways to support this work. Predictable support, even a small amount, helps me plan ahead, cover hosting costs, and keep building without worrying about whether the lights stay on next month.

Either way, thank you for using what I've made. That alone makes it worth it.