50 free browser-based tools for finance, developers,
students and productivity. Everything runs client-side —
no backend, no accounts, nothing sent to any server.
Includes: loan calculators, debt payoff planner,
JSON formatter, regex tester, JWT decoder, QR code
generator, invoice PDF generator, and 43 more.
Built with Next.js. Lighthouse 95+ across all pages.
No ads until AdSense approval — currently completely
clean. Feedback on missing tools very welcome.
