Blog
Guides, tutorials, and tips for getting the most out of Free2Box tools.
BMI Calculator: What One Number Can (and Can't) Tell You
Understand how BMI is calculated, what the ranges mean, and why this metric has important limitations you should know about.
Audio Format Conversion Guide: MP3, WAV, FLAC — Which One Should You Use?
Understand the differences between common audio formats, learn when to use each one, and convert between them using a free online tool.
Color Picker & Palette Guide: Stop Guessing, Start Using Color Codes
Learn color formats (HEX, RGB, HSL), basic color theory, and practical tips for picking colors that work together in web design and beyond.
The Power of Compound Interest: Watch Your Money Grow with a Calculator
Understand compound interest through real numbers, use a calculator to plan investments and savings, and see how time and consistency make a massive difference.
Still Using Your Birthday as a Password? Here's How to Do Better
Understand common password vulnerabilities and learn to generate truly secure passwords with a free online tool, plus practical tips for managing them.
Getting Started with PDF Tools: Merge, Split, Convert, and Avoid Common Mistakes
A practical beginner's guide to working with PDF files online. Learn when to merge, split, convert, compress, and reorder PDFs without damaging document quality.
Image Format Guide: PNG vs JPG vs WebP — When to Use Each
Understand the differences between PNG, JPG, and WebP image formats. Learn when to use each format for web, print, and social media.