Most Popular Tools

Our most-used free online calculators and utilities

These are the tools our users reach for most often. From quick calculations to developer utilities, these free tools help you get things done faster.

Quick Calculations

Essential calculators for everyday math

Percentage Calculator

Calculate percentages, find X% of Y, percentage change

Tip Calculator

Calculate tip amount and split bills

Discount Calculator

Calculate sale prices and savings

Age Calculator

Calculate exact age from birthdate

Unit Converters

Convert between common units instantly

Temperature Converter

Celsius, Fahrenheit, Kelvin

Length Converter

Metric and imperial lengths

Weight Converter

Kilograms, pounds, ounces

Cooking Converter

Cups, tablespoons, milliliters

Developer Favorites

Tools developers use daily

JSON Formatter

Beautify and validate JSON

Base64 Encoder

Encode and decode Base64

UUID Generator

Generate random UUIDs

Timestamp Converter

Unix time to readable date

Text Tools

Work with text efficiently

Word Counter

Count words, characters, sentences

Case Converter

Upper, lower, title case

Slug Generator

Create URL-friendly slugs

Lorem Ipsum Generator

Generate placeholder text

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