I kept switching between 5 sites for UUID generation, Base64 encoding, and mortgage math. So I built one toolbox with everything I use daily. 14 tools: password generator, UUID, text encoder, base converter, unit converter, QR codes, timestamps, mortgage calculator (4-scenario comparison), retirement, auto loan, compound interest, savings goals, debt payoff, gas vs electric. All tools run client-side. 4 languages with locale-aware formatting. No account needed.

Hey everyone! I built SD6 Tools because I was tired of switching between 5 different sites every day — one for UUID generation, another for Base64 encoding, a third for mortgage calculations. It started with the mortgage calculator when I was buying a house and couldn't find a free tool that let me compare multiple scenarios side-by-side. Then I kept adding the dev tools I use daily. What I'm most proud of is the multilingual support — it works in English, French, Spanish, and German with proper locale-aware formatting. A German user sees 1.234,56 € while an American sees $1,234.56. Took way more effort than I expected. All 14 tools run in your browser, no account needed. Would love to hear which tools you'd want to see added next!

SD6 Tools

14 free dev & finance tools in one place. No signup.

14 free dev & finance tools in one place. No signup.