Guides, tutorials and tips to get the most out of our tools.
A modern favicon is a set of sizes and formats plus a web manifest. Learn exactly what you need, the HTML to add, and how to generate it all from one image.
AZ Utils Editorial · · 9 min read
WebP files are 25–35% smaller than PNG at the same quality. Learn when to convert each way and how to do it losslessly with a free browser-based converter.
AZ Utils Editorial · · 9 min read
Cut image file sizes by up to 80% without visible quality loss. Learn lossy vs lossless, formats and a step-by-step workflow — plus a free browser-based compressor.
AZ Utils Editorial · · 10 min read
Master the handful of percentage formulas that cover discounts, scores, tips and percentage change — with examples and a free percentage calculator.
AZ Utils Editorial · · 9 min read
How age is really calculated — leap years, month lengths and completed periods — with a worked example and a free tool that gives your exact age instantly.
AZ Utils Editorial · · 8 min read
Learn how to add and remove GST with the exact formulas, CGST/SGST/IGST split and worked examples — or do it instantly with our free GST calculator.
AZ Utils Editorial · · 10 min read
JSON explained for developers and beginners — syntax, data types, code examples in JavaScript and Python, common mistakes and best practices.
AZ Utils Editorial · · 12 min read
A guide to validating JSON — syntax validation (is it well-formed?) vs schema validation (is the structure right?) with JSON Schema, and why it matters.
AZ Utils Editorial · · 11 min read
How to format JSON — beautify it for readability or minify it for production — in tools, editors, the command line and code, with the why behind each.
AZ Utils Editorial · · 10 min read
