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.

Health Tools

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

Text Tools

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.

Education Tools

Grade Calculator

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

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