Free Online
Tools
Calculators, image converters, and utilities. All free, fast, and private - no uploads, no tracking.
Weeks in Life Calculator
Visualize your life in weeks and see how many weeks you've lived and have remaining
Age Calculator
Calculate your exact age in years, months, days, hours, minutes, and seconds
Date Calculator
Calculate the difference between dates or add/subtract days from any date
PNG to JPG Converter
Convert PNG images to JPG format instantly in your browser
JPG to PNG Converter
Convert JPG/JPEG images to PNG format for transparency support
Image Compressor
Compress images to reduce file size without losing quality
Image Resizer
Resize images to custom dimensions with aspect ratio control
Word Counter
Count words, characters, sentences, and paragraphs instantly
Case Converter
Convert text between different cases - uppercase, lowercase, title case, and more
Password Generator
Generate strong, secure passwords with customizable options
JSON Formatter
Format, minify, and validate JSON data with syntax highlighting
QR Code Generator
Create custom QR codes for URLs, WiFi, contact cards, and more
Percentage Calculator
Calculate percentages, discounts, and percentage changes
BMI Calculator
Calculate your Body Mass Index with metric or imperial units
Tip Calculator
Calculate tips and split bills easily among friends
Tax Return Estimator
Estimate your federal income tax return for 2025
Salary Calculator
Convert hourly wage to annual salary and view payroll breakdowns
IP Subnet Calculator
Calculate IPv4 subnet information and network details
Gas Mileage Calculator
Calculate your vehicle's fuel efficiency and trip costs
Random Number Generator
Generate random numbers and strings with custom options
Dice Roller & Coin Flip
Roll dice, flip coins, and make random yes/no decisions
Why Use NexTools?
Lightning Fast
Instant calculations in your browser
100% Private
No data collection or tracking
Always Free
No accounts or subscriptions required
About NexTools
NexTools provides a growing collection of 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, 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, or managing finances, your privacy is guaranteed.