How to Tell if a Website Is Really Uploading Your Files
Three simple checks — including one that cannot be faked — for working out whether a free online tool sends your document to a server or does the work on your own device.
Privacy
How Much House Can You Actually Afford?
The 28/36 rule, everything it leaves out — tax, insurance, maintenance, closing costs — and three ways to test the number against your own life before you commit.
Money
How to Make a Passport Photo From a Phone Picture
A step-by-step guide to taking, cropping, and printing a passport photo yourself — the rules that cause rejections, official sizes by country, and when to use a shop instead.
Photos · Documents
How to Send Only the Pages You Need From a PDF
Why attaching the whole contract is a habit worth breaking, how to pull out the right page range, and why a black box over text is not redaction.
Documents · Privacy
How to Merge Scanned Pages Without the Order Going Wrong
Why page 10 ends up before page 2, the two-minute renaming fix, and the four other things that quietly go wrong when a stack of paper becomes one PDF.
Documents
What You're Actually Pasting Into an Online JSON Formatter
Debug payloads carry tokens, customer data, and internal hostnames. How to check whether a formatter parses locally, and what to do if you already pasted.
Developer · Privacy
Why Two Names That Look Identical Don't Match
The trailing spaces, non-breaking spaces and invisible characters behind a spreadsheet lookup that fails on a name you can see. How to confirm it, then fix it in two minutes.
Spreadsheets · Text
Five Regex Patterns That Look Right and Quietly Aren't
Email patterns that reject real addresses, missing anchors, greedy quantifiers, nested quantifiers that hang the process, and newline assumptions — with what to write instead.
Developer
camelCase, snake_case or kebab-case: Which Goes Where
Which naming convention belongs in which language, why acronyms cause arguments, and the one place to convert between them so half your codebase doesn't disagree with the other half.
Developer
Asking AI for the First Time: What to Ask, and What Not to Paste
Which questions these programs are genuinely good at, which they get confidently wrong, and the short list of things you should never type into one.
AI · Privacy