100% Free & Private

Free Online
Tools

39+ calculators, converters, and utilities. All free, fast, and private.

Why Use NexTools?

Lightning Fast

Instant calculations right in your browser. No waiting, no loading screens.

Tested for Accuracy

Our calculators are regularly tested with comprehensive unit tests to ensure accurate results.

100% Private

All processing happens locally. Your data never leaves your device.

Always Free

No accounts, no subscriptions, no hidden fees. Completely free forever.

About NexTools

NexTools provides a growing collection of 39+ free, easy-to-use online tools for everyday tasks. From life calculators that help you visualize time and calculate your age, to image converters that transform and optimize your photos, medical calculators for healthcare professionals, and random generators for decision making - we offer practical utilities that work instantly in your browser.

All our tools are 100% client-side - your data never leaves your device. No uploads, no accounts, no tracking. Whether you're converting images, calculating dates, managing finances, or making random decisions, your privacy is guaranteed.

Quality & Accuracy

We take accuracy seriously. Our calculators are regularly tested with comprehensive unit tests to ensure you get reliable results every time. With over 60+ unit tests covering loan calculations, BMI calculations, percentage calculations, and more, you can trust that our tools deliver accurate results for your important decisions.