MasterKit

All Tools

Explore our collection of simple and useful online tools for everyday tasks.

Showing 9 tools

Area Calculator

Calculate the area of circles, rectangles, squares, triangles and more.

Calculate percentages quickly and easily.

Download YouTube thumbnails in high quality.

Resize images quickly and easily.

Calculate how your money can grow over time with compound interest and regular contributions.

Calculate monthly payments and total interest.

Calculate your BMI and understand your result.

Count words, characters and sentences instantly.

Format and validate JSON data easily.