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Discover all our free online tools and games

Everyday math, health, and planning calculators

Quick browser games and logic puzzles

Format, convert, and inspect developer data

Calculate your Body Mass Index (BMI) and determine if you are in a healthy weight range.

Calculate your exact age in years, months, weeks, and days based on your birth date.

Calculate percentages, percentage increases, and decreases.

Calculate advanced math expressions with trigonometry, logarithms, powers, roots, constants, memory, and history.

Classic number puzzle game. Fill the grid so each row, column, and 3x3 box contains digits 1-9.

Slide numbered tiles to combine them and reach the 2048 tile.

Classic snake game. Eat food to grow longer without hitting walls or yourself.

Classic Minesweeper logic game. Reveal safe cells, flag hidden mines, and clear the board.

Format, validate, and beautify JSON data.

Encode and decode Base64 data.

Convert colors between HEX, RGB, HSL, and other formats.