Guides

Practical, jargon-free explanations of the things our tools help with — image formats, PDFs, passwords, and more.

WebP vs JPEG vs PNG: Which Image Format Should You Actually Use?
A practical comparison of WebP, JPEG, and PNG covering file size, transparency, quality loss, and browser support, with clear rules for choosing between them.
How to Compress Images Without Obviously Losing Quality
A step-by-step method for shrinking image file sizes while keeping them looking sharp, including how to pick a quality setting and the right dimensions.
Converting PDF to Word: What Actually Works and What Does Not
An honest explanation of why PDF to Word conversion is imperfect, what determines whether it will work on your file, and how to get the best result.
How to Create Strong Passwords That Are Actually Practical
What genuinely makes a password hard to crack, why common advice about symbols and frequent changes is outdated, and a realistic system for managing passwords.
Understanding BMI: What It Measures and What It Misses
A clear explanation of how body mass index is calculated, where the categories came from, and the well-documented situations where BMI gives misleading results.