Free online tools. Instant results.

Math

Age Calculator

Find exact age in years, months, and days from a birth date, as of today or any date you choose.

Open tool → AI

AI Prompt Builder

Build clear, well-structured AI prompts by filling in a simple form — task, context, format, and tone.

Open tool → Money

Auto Loan & Lease Calculator

Estimate your monthly auto payment for a loan or a lease, accounting for trade-in value, down payment, residual value, and sales tax.

Open tool → Money

Auto Loan Refinance Calculator

Compare your current auto loan to a refinance offer — monthly payment, total interest, and the term-extension trap.

Open tool → Health

BMI Calculator

Calculate your Body Mass Index in US or metric units, and see the healthy weight range for your height.

Open tool → Health

Calorie Calculator

Calculate your BMR and daily calorie needs (TDEE) using the Mifflin-St Jeor formula, in US or metric units.

Open tool → Web

Color Picker

Pick a color on an interactive wheel and get the HEX, RGB, and HSL values instantly.

Open tool → Money

Compound Interest & Savings Calculator

Calculate how your savings grow with compound interest and regular contributions.

Open tool → Web

Contrast Checker

Check the contrast ratio between two colors and see pass/fail results for WCAG AA and AAA, for normal text, large text, and graphical objects.

Open tool → Reference

Countdown Generator

Create a live countdown to any date and time, and share a link so anyone can watch it tick down.

Open tool → Money

Debt Payoff Calculator

Compare the debt snowball and debt avalanche payoff strategies across multiple debts.

Open tool → Web

Domain Name Search

Search for available domain names and register them, along with hosting, email, and SSL.

Open tool → Money

Event Budget Calculator

Plan the budget for a church event, conference, or fundraiser — calculate costs, find your break-even ticket price, and export to Excel.

Open tool → Web

Favicon Maker

Upload a logo and generate a complete favicon set — favicon.ico, PNG icons, Apple touch icon, Android icons, and a web manifest.

Open tool → Security

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes for text or a file.

Open tool → Web

Image Compressor, Converter & Resizer

Compress, convert, and resize images right in your browser — JPG, PNG, and WebP. Nothing is uploaded to a server.

Open tool → Web

JSON Formatter

Format and beautify JSON, minify it, validate it, browse it as an interactive tree, and download the result.

Open tool → Web

Meta Tag Generator

Generate title, description, keywords, Open Graph, and Twitter Card meta tags, ready to paste into your <head>.

Open tool → Money

Mortgage Calculator

Estimate your monthly mortgage payment, including principal, interest, taxes, insurance, and HOA.

Open tool → Money

Mortgage Extra-Payment Calculator

See how extra monthly payments or a one-time lump sum shorten your mortgage and save you interest.

Open tool → Reference

National Day Finder

Find out what fun, unofficial national holidays fall today and over the next few days.

Open tool → Security

Password Generator

Generate strong, random passwords with full control over length and character types.

Open tool → Security

Password Strength Checker

Check how strong a password is and see exactly what would make it stronger.

Open tool → Money

Paycheck Calculator

Convert salary to hourly, hourly to salary, or calculate overtime pay — with weekly, biweekly, and monthly breakdowns.

Open tool → Math

Percentage Calculator

Calculate a percentage of a number, find what percent one number is of another, or calculate percent increase and decrease.

Open tool → Math

Proportion Calculator

Know a ratio and one value? Solve for the missing one instantly — perfect for resizing images or scaling anything proportionally.

Open tool → Web

QR Code Generator

Turn any link or text into a downloadable QR code, with customizable size, error correction, and colors.

Open tool → Reference

Random Picker

Enter a list of names or items and pick one or more at random — great for raffles, giveaways, or making a random choice.

Open tool → Money

Rent vs Buy Calculator

Compare renting and buying over time, accounting for the opportunity cost of your down payment, appreciation, and rent increases.

Open tool → Text

Text Case Converter

Switch text between UPPERCASE, lowercase, Title Case, Sentence case, and more, instantly.

Open tool → Reference

Timezone Converter

Convert a date and time from one timezone to major cities around the world, with accurate daylight saving time handling.

Open tool → Money

Tip Calculator

Work out the tip and split the bill evenly between any number of people.

Open tool → Math

Unit Converter

Convert between length, weight, volume, and temperature units — pounds to grams, inches to centimeters, and more.

Open tool → Web

UTM Builder

Build a campaign-tracked URL for Google Analytics and other tools — add source, medium, campaign, term, and content.

Open tool → Web

UUID Generator

Generate random (v4) or time-ordered (v7) UUIDs, one at a time or in bulk.

Open tool → Reference

Wheel Spinner

Enter your options and spin a wheel to pick one at random — great for raffles, games, or breaking a tie.

Open tool → Text

Word & Character Counter

Count words, characters, sentences, and paragraphs live, with reading time and platform character-limit checks.

Open tool →