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39+ calculators, converters, and utilities. All free, fast, and private.
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Life & Time
Life, age, and time calculators
Image Tools
Image converters and editors
Text Tools
Text and content tools
Developer
Developer and coding tools
Calculators
Math and utility calculators
Financial
Money and finance calculators
Random
Random generators and decision tools
Medical
Medical calculators and converters for healthcare professionals
Fitness & Health
Fitness, health, and wellness calculators
Health
Pregnancy, health tracking, and wellness tools
Education
Student tools, GPA calculators, and academic planning
Expert Reviews
In-depth reviews of the best products and services. Compare features, pricing, and find the perfect solution for your needs.
Best Crypto Exchanges
Compare fees, security, and features of top cryptocurrency trading platforms.
Best Robo-Advisors
Expert reviews of automated investing platforms for building your wealth.
Best Password Managers
Compare security, features, and pricing of top password vault solutions.
Best Secure Email
Reviews of encrypted email providers to protect your communications.
Best Cell Phone Plans
Compare affordable wireless plans and MVNO carriers to save money.
Best Credit Cards
Expert reviews and comparisons of rewards, cashback, and travel cards.
Most Popular Tools
Age Calculator
Calculate your exact age in years, months, days, hours, minutes, and seconds
BMI Calculator
Calculate your Body Mass Index with metric or imperial units
Percentage Calculator
Calculate percentages, discounts, and percentage changes
Word Counter
Count words, characters, sentences, and paragraphs instantly
PNG to JPG Converter
Convert PNG images to JPG format instantly in your browser
Password Generator
Generate strong, secure passwords with customizable options
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.