Guides

Long-form, plainly written explainers on the topics behind our tools. No fluff, no filler — just the useful bits.

How to Create a Strong Password

A practical guide to building passwords that resist modern cracking attacks — length, entropy, common mistakes, and the role of password managers.

A friendly explanation of the technology behind QR codes — how they store data, what the patterns mean, and where they are used.

Understand the difference between lossy and lossless compression, when to use each format, and how to keep files small without visible artifacts.

The math behind percentages, increases, decreases, and change — with worked examples for shopping, tips, taxes, and grades.

Guidelines for capitalisation, punctuation, and structure that make written content easier to read and more professional.

Practical techniques for stripping stray spaces, hidden characters, and broken formatting from copy-pasted text.

What Body Mass Index actually measures, when it is useful, and where it falls short as a health indicator.

Beyond the birthday: how years, months, and days combine into an exact age, and why calendars make it tricky.

How to move confidently between metric and imperial units for length, weight, volume, and temperature.

A traveller's cheat sheet for tipping etiquette across common destinations — plus how to split a bill without arguments.

How computers generate 'random' numbers, why most are not truly random, and when the difference matters.

A developer's field guide to reading, formatting, validating, and debugging JSON — the format that runs the modern web.

Why designers still reach for placeholder text, when it helps, and when it actively harms a project.

How to choose accessible, brand-consistent colors — plus the difference between HEX, RGB, and HSL and when to use each.

What can hide inside a QR code, how attackers use them, and simple habits that keep you out of trouble.