📰 Dev.to · William Andrews

CSV looks like the simplest file format there is. It isn't. A practical guide to delimiters, quoting, encoding, the Excel traps that destroy data, and how to pa

What Base64 actually is, when to use it, the encryption misconception, URL-safe variants, padding rules, and how to encode and decode it in every major language

What Unix timestamps actually are, how to convert them in JavaScript, Python, SQL, and the command line, the milliseconds vs seconds trap, timezone gotchas, and

Percent-encoding, encodeURI vs encodeURIComponent, the %20 vs + space trap, double-encoding bugs, and how to construct query strings without breaking everything

Why SQL formatting matters more than most developers think, and the conventions that make queries readable by anyone on the team.

When you paste a JWT or API key into an online tool, where does it actually go? Most developers don't know — and the answer should change which tools you use.

A practical guide to testing WebSocket endpoints directly in your browser — debug auth flows, inspect JSON frames, and verify your server before writing a singl

An honest account of building DevCrate — 21 browser-based developer tools in vanilla HTML, CSS, and JS. What I learned, what broke me, and what I'd do different

JSON is everywhere. It's the format your API returns data in. It's your config files, your...

For the past few weeks I've been building DevCrate — a suite of developer tools that run 100% in...

I recently built and deployed my first API — an email validation tool built with Python and FastAPI....