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.
How QR Codes Work
A friendly explanation of the technology behind QR codes — how they store data, what the patterns mean, and where they are used.
How to Compress Images Without Losing Quality
Understand the difference between lossy and lossless compression, when to use each format, and how to keep files small without visible artifacts.
How Percentage Calculators Work
The math behind percentages, increases, decreases, and change — with worked examples for shopping, tips, taxes, and grades.
Best Practices for Formatting Text
Guidelines for capitalisation, punctuation, and structure that make written content easier to read and more professional.
Tips for Cleaning Messy Text
Practical techniques for stripping stray spaces, hidden characters, and broken formatting from copy-pasted text.
Understanding BMI and Its Limits
What Body Mass Index actually measures, when it is useful, and where it falls short as a health indicator.
How Age Is Calculated Precisely
Beyond the birthday: how years, months, and days combine into an exact age, and why calendars make it tricky.
Unit Conversion Basics
How to move confidently between metric and imperial units for length, weight, volume, and temperature.
How to Tip Around the World
A traveller's cheat sheet for tipping etiquette across common destinations — plus how to split a bill without arguments.
True Randomness vs Pseudo-Random Numbers
How computers generate 'random' numbers, why most are not truly random, and when the difference matters.
Working with JSON Effectively
A developer's field guide to reading, formatting, validating, and debugging JSON — the format that runs the modern web.
When to Use Lorem Ipsum
Why designers still reach for placeholder text, when it helps, and when it actively harms a project.
Picking Colors for the Web
How to choose accessible, brand-consistent colors — plus the difference between HEX, RGB, and HSL and when to use each.
Scanning QR Codes Safely
What can hide inside a QR code, how attackers use them, and simple habits that keep you out of trouble.
How to Resize an Image Online Without Losing Quality
A practical guide to resizing images online — pixels versus percentage, aspect ratio, upscaling limits, and choosing the right output format.
Word Counts, Character Limits and Reading Time Explained
How word counters work, why character limits matter for SEO and social posts, and how reading time estimates are calculated.
JPG vs PNG: Which Image Format Should You Use?
A clear comparison of JPG and PNG — lossy versus lossless compression, transparency, file size, and when converting between them makes sense.
How to Convert Images to PDF (and Keep Them Readable)
Turn JPG and PNG photos into a single PDF — page sizes, page order, image quality, and the mistakes that make documents unreadable.
Base64 Encoding Explained (And When Not to Use It)
What Base64 is, why it exists, how to encode and decode it safely, and the security misunderstanding that trips developers up.