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Guides, tips, and updates to help you get more done.
Which Barcode Type Should You Actually Use? CODE 128 vs EAN-13 vs UPC-A
Not every barcode is interchangeable — a retail scanner expects a specific format, and picking the wrong one means a code that simply won't scan at checkout.
Base64 Encoding: What It's Actually For (and the One Thing People Get Wrong)
Base64 output looks scrambled, which is exactly why people mistake it for security. It isn't — it's encoding, not encryption, and the difference matters.
What a UUID Actually Is (and Why Two Are Never Going to Collide)
A UUID looks like random noise, but the format is precise, and the odds of ever generating a duplicate are so small the math is almost more interesting than the ID itself.
What "Password Entropy" Actually Means (and Why Length Beats Complexity)
The bits-of-entropy number next to a generated password isn't marketing fluff — it's a real, calculable measure of how many guesses an attacker would need. Here's the actual math.
MD5 vs SHA-256: Which Hash Should You Actually Use?
Both will generate a hash from your input. Only one of them should be anywhere near anything security-related in 2026.
Why Your JSON Looks Like a Mess (and How to Fix It in One Paste)
API responses and minified config files often come back as one unreadable line. Here's what's actually wrong with it and how formatting fixes it.
What's Inside a JWT? A Plain-English Breakdown
JSON Web Tokens look like gibberish, but they're just Base64-encoded JSON with a signature stapled on. Here's what each part means and how to verify one.
Client-Side AI, Explained: Why Some Tools Never Touch Our Servers
Four tools on this site process your voice, images, and text entirely on your own device — here's what that actually means and why it's different from the norm.