How to Write a Clean URL Slug That Google and Readers Both Like
Write a clean URL slug readers and Google both like: lowercase, hyphens, short, no stop-word pile-up. Includes Hello World! to hello-world example.
QR Codes: How to Make One and How to Scan One Safely
Learn what QR codes hold, static vs dynamic codes, how to make one, and how to scan safely. Includes an example.com example and quishing warning signs.
How to Calculate Your Exact Age in Years, Months, and Days
Learn to calculate exact age in years, months, and days. Includes the 15 March 1995 worked example, leap years, 29 February, and why calculators differ by a day.
What Your BMI Number Actually Means (and What It Does Not)
BMI is a simple weight-to-height screening index. Learn the formula, the WHO categories, a worked 70 kg / 175 cm example, and why muscle, fat, and age matter.
A Beginner’s Guide to Regular Expressions (With Examples That Actually Work)
A beginner’s guide to regular expressions with examples that actually work — digits, anchors, quantifiers, and when not to use regex.
How to Shrink an Image for the Web Without Making It Look Blurry
Learn how to shrink an image for the web without making it look blurry — resize vs compress, JPG quality, WebP, and 1200px dimensions.
What Is a UUID and When Should You Use One
What is a UUID? Learn the v4 format 8-4-4-4-12, database keys, worked example, and why UUIDs are not passwords or secrets.
How to Convert PDF to Word Without Losing Your Formatting
Learn how to convert PDF to Word without losing formatting, with DOCX tips for tables, images, scanned PDFs, fonts, and privacy.
How to Read a Loan Offer: EMI, Total Interest, and the Fees Lenders Hide
How to read a loan offer: EMI formula, total interest vs principal, hidden fees, and prepayment. Worked example 100000 at 8 percent.
What a Real SHA-256 Hash Looks Like (and Why Short Hashes Are Fake)
What a real SHA-256 hash looks like: 64 characters for hello, MD5 vs SHA-256, why short hashes are fake, and file checksum checks.