Free Online Tools
A growing collection of free calculators, generators, converters, and decision makers — every one runs entirely in your browser. Nothing to install, no sign-up, and your data never leaves your device.
QR Code Generator
Create a QR code from any text or URL and download it as a PNG image.
Discount Calculator
Enter an original price and discount percentage to instantly see the final price and how much you save.
Percentage Calculator
Calculate percentages instantly — find what percent X is of Y, or calculate X% of Y.
Tip Calculator
Calculate the tip on any bill by percentage and split the total among multiple people.
Unit Converter
Convert between common units — centimetres & inches, kilograms & pounds, metres & feet, kilometres & miles.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit and Kelvin instantly — enter one value and see the other two scales at once.
BMI Calculator
Calculate your Body Mass Index (BMI) and find out your weight category.
Age Calculator
Calculate your exact age in years, months, and days from your date of birth.
Loan & EMI Calculator
Calculate your monthly loan instalment, total interest, and total repayment amount.
Calorie Calculator
Calculate your daily calorie needs based on age, weight, height, and activity level.
Compound Interest Calculator
Calculate how your investment grows over time with compound interest.
GPA Calculator
Calculate your weighted GPA from course grades and credit hours.
Which World Cup 2026 Team Are You?
Answer 8 fun questions and discover which 2026 FIFA World Cup nation matches your personality.
Which Animal Are You?
Answer 7 quick questions and discover your true spirit animal — from the bold lion to the clever fox.
Which Element Are You?
Fire, Water, Earth or Air? Answer 7 questions to reveal the classical element that matches your personality.
Which Season Are You?
Spring, Summer, Autumn or Winter? Answer 7 questions to find the season that matches your personality.
World Cup 2026 Bracket Predictor
Build your own 2026 FIFA World Cup knockout bracket and predict the champion in a few taps.
Countdown Timer
A free online countdown timer with Pomodoro presets, start/pause/reset, and an alarm when time is up.
Sales Tax Calculator
Enter an amount and tax rate to instantly see the tax added and the total price you pay.
Days Between Dates Calculator
Pick two dates to instantly see the number of days, weeks, and months between them.
Hourly to Salary Calculator
Convert an hourly wage into annual, monthly, weekly, and daily pay in seconds.
Inflation Calculator
See what a dollar amount from one year is worth in another, using official U.S. CPI data.
Hash Generator
Generate SHA-256, SHA-1, SHA-384, and SHA-512 hashes from any text, instantly in your browser.
Base64 Encode / Decode
Encode text to Base64 or decode Base64 back to text, with full Unicode support.
Free Calculators, Generators & Converters — All in One Place
QTNest brings together the everyday tools people search for most, without the clutter, pop-ups, or accounts that bog down so many utility sites. Whether you need to crunch a quick number, generate something random, or settle a decision, the right tool is a couple of clicks away — and it works the same on your phone as on your desktop.
The calculators cover the numbers that come up in real life: work out repayments with the Loan Calculator, add tax to a price with the Sales Tax Calculator, convert an hourly wage into a yearly figure with the Hourly to Salary Calculator, count the gap between two dates with the Days Between Dates Calculator, or check your BMI and percentages.
The generators create things on demand — a scannable QR code for a link, menu, or wifi network, or a checksum from the Hash Generator when you need to verify a file hasn't changed. And for something lighter, the personality quizzes are a few questions each and score you instantly: find out which animal you are, which element matches your temperament, or which World Cup team you really are.
Every tool is genuinely free and runs client-side, which means whatever you type — a price, a password, a block of JSON — stays in your browser and is never uploaded or stored. Prefer a guided tour? Our blog post on the best free online tools walks through the most popular ones and when to reach for each.