Solve everyday problems with 11 free online calculators at zaerp.com. From financial planning (mortgage, percentage) to health (BMI), writing (word counter, markdown editor), and developer utilities (UUID generator, radix converter, timestamp converter).
Every calculator runs entirely in your browser with zero external dependencies — no JavaScript libraries, no server calls. The UUID generator uses the browser's crypto API for true random UUIDs that meet RFC 4122.
Calculators work offline once loaded, making them reliable for quick math even on a flaky connection.
Yes. All 11 calculators are 100% free with no signup or install. Each calculator runs entirely client-side in your browser.
Yes, once loaded. The calculators have zero external dependencies, so they continue to work even if your internet connection drops.
Yes. The calculators use standard formulas (e.g. BMI = weight/height², mortgage amortization) and run locally. The UUID generator uses the browser's crypto API for true random UUIDs.