Guides, tutorials and tips to get the most out of our tools.
A repeatable workflow to reduce image size by 60–80% with no visible quality loss — resize, choose the right format, compress and preview.
AZ Utils Editorial · · 7 min read
Which image format should you use on the web? A clear decision framework comparing JPEG, PNG, WebP, AVIF, SVG and GIF, with examples.
AZ Utils Editorial · · 8 min read
Lossy vs lossless compression explained — the differences, when to use each, and which image formats belong to each camp, with examples.
AZ Utils Editorial · · 7 min read
A plain-English look at how image compression works — redundancy, lossy and lossless techniques, and why photos compress more than logos.
AZ Utils Editorial · · 8 min read
The profit percentage formula made clear — markup vs margin, how to calculate each, and how to set a selling price for a target margin.
AZ Utils Editorial · · 8 min read
How to calculate discount percentages — final price, the saving, the original price, and the stacked-discount trap that catches everyone out.
AZ Utils Editorial · · 7 min read
How to calculate exam percentage from marks — single subject, overall aggregate and weighted — with clear worked examples for students and parents.
AZ Utils Editorial · · 7 min read
The percentage decrease formula with examples — measure price drops, falling sales and reductions, and why a decrease and increase never cancel out.
AZ Utils Editorial · · 7 min read
The percentage increase formula explained, with examples — measure price rises, salary hikes and growth, and learn why you divide by the original value.
AZ Utils Editorial · · 7 min read
