Usefulia Guides
Practical instructions, examples and tool limitations.
Images · Usefulia
JPG vs PNG vs WebP: How to Choose an Image Format
A practical guide to JPG, PNG and WebP for photos, transparency, websites and file size.
Images · UsefuliaImage Resolution, Pixels and DPI Explained Simply
Understand pixels, dimensions and DPI before resizing images for screens, documents or print.
Images · UsefuliaImage Compression vs Resizing: What Is the Difference?
Understand when to compress an image, when to resize it, and why the two operations affect quality and file size differently.