Free tools, built to actually work

Cozyleaf is a small, independent collection of online tools built for everyday tasks — checking your BMI, calculating your GPA, converting an image, or testing your typing speed. Every tool runs directly in your browser, with no account, no download, and no hidden fees.

The site is built and maintained by a single developer with a simple goal: make useful tools that load fast, work correctly on any device, and respect your time. There are no dark patterns here, no forced sign-ups, and no unnecessary steps between you and the result you need.

What you'll find on Cozyleaf

• Calculators — BMI, calorie, BMR, GPA/CGPA, love, and dog food calculators
• Image tools — quick, browser-based image format conversion
• Text tools — a typing speed test and a stylish name generator

Why everything runs in your browser

Every tool on Cozyleaf processes your input directly on your device rather than uploading it to a server. That means faster results and nothing of yours is stored or transmitted anywhere. As new tools are added, this same principle guides what gets built and when.

Get in touch

Have a tool you'd like to see, or found something that isn't working right? Visit the Contact page — feedback directly shapes what gets built next.