Free Online Tools — Private & Secure

A collection of free, browser-based utilities. Everything runs in your browser — share any calculation via a unique link, or embed any tool directly on your website.

Runs entirely in your browserShareable calculation linksEmbeddable on any website

Volume Converters

Gallons to Liters Converter

Convert between gallons and liters instantly. Everything runs in your browser — your data never leaves your device.

Finance Tools

Mortgage Calculator

Calculate your monthly mortgage payment and total cost. Everything runs in your browser — your data never leaves your device.

Loan Calculator

Enter your loan amount, annual interest rate, and term to instantly calculate your monthly payment and total cost.

Car Loan Calculator

Enter vehicle price, down payment, trade-in value, interest rate, and loan term to calculate your monthly payment.

Compound Interest Calculator

Calculate how your investment grows with compound interest.

Paycheck Calculator

Enter your gross pay and tax rates to calculate your net take-home pay and annual deductions.

Tip Calculator

Enter your bill, choose a tip percentage, and split the total among your group.

Health Tools

BMI Calculator

Calculate your Body Mass Index in metric or imperial units. Everything runs in your browser — your data never leaves your device.

Text Tools

Word Counter

Paste or type your text below to instantly count words, characters, sentences, paragraphs, and estimate reading time.

Generators

Random Number Generator

Set a range and how many numbers to generate, then click the button. All results are generated locally in your browser.

QR Code Generator

Type any URL or text below to instantly generate a QR code. Everything runs in your browser — nothing is uploaded.

Education Tools

Grade Calculator

Enter your grades and optional weights to calculate your weighted average. Leave weights blank for a simple average.

GPA Calculator

Add your courses with credit hours and letter grades to calculate your cumulative GPA on the 4.0 scale.

Final Grade Calculator

Find out what score you need on your final exam to reach your target grade.

Network Tools

What Is My IP Address?

Your current public IP address as seen by the internet.

Math Tools

Percentage Calculator

Three common percentage calculations in one place.

Temperature Converters

Celsius to Fahrenheit

Enter a temperature in Celsius to convert it to Fahrenheit.

Fahrenheit to Celsius

Enter a temperature in Fahrenheit to convert it to Celsius.

Length Converters

Meters to Feet

Enter a length in meters to convert it to feet and inches.

Time Tools

Time Calculator

Add or subtract two time durations in hours, minutes, and seconds.