One person, six small projects
Developer Tools & Writing, Built for Privacy
Browser-only utilities that never phone home, five personal blogs going back to 2009, and a Swedish accounting app — all written, run, and paid for by one engineer as a side project.
What you'll find here
Everything under DevTools and SMPP runs client-side in your browser — nothing you paste or upload is sent to a server, logged, or stored. The blogs and Bara Bokföring are separate, regular web apps. Cards marked SV or FR/SV lead to content that isn't in English.
About gurk4n.com
gurk4n.com is a small, independently run corner of the web maintained by a software engineer as a side project. The tools collected here started as things built for my own work — decoding SMPP PDUs while debugging an SMS gateway, checking a JWT without pasting it into a random website, converting GPS coordinates for a mapping project — and were cleaned up enough to be useful to other people too.
There is no account system, no server-side processing of the data you paste into these tools, and no tracking beyond what is needed to serve occasional, consent-gated advertising that helps cover hosting costs. If you would rather not see ads, that is fine — every tool works exactly the same either way.
The blogs linked above go back to 2009 and were migrated from an older Blogspot setup one by one; some are still active, others are left as-is for reference. Bara Bokföring, linked above too, is a separate paid/free Swedish accounting app and the newest thing built under gurk4n.com — still small, still finding its first users.
Frequently asked questions
Are these tools actually free to use?
Yes. There is no paywall, no account, and no usage limit on any tool on this site.
Where does my data go when I use a tool?
Nowhere. Every tool on tools.gurk4n.com and the SMPP decoder runs entirely in your browser using JavaScript — nothing you type, paste, or upload is transmitted to a server or stored anywhere.
Who maintains this site?
gurk4n.com is run by one person as a side project alongside a day job in software engineering. It is not backed by a company.
Do you use cookies or track visitors?
Only what is strictly needed. See the Cookie Policy and Data Policy pages for the full details, including how advertising consent is handled.
Can I request a new tool or report a bug?
Yes — reach out via the contact details on the blog, or open an issue on GitHub if you found the project there.
What language are the blogs written in?
The main blog and one archived blog are in Swedish, one archived blog is in French and Swedish, and two are in English. Each blog card on this page is labeled with its language.
Is Bara Bokföring free?
Bara Bokföring is a separate Swedish accounting web application, not a free browser tool like the utilities on tools.gurk4n.com. See bokforing.gurk4n.com for its own pricing and signup details.