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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.
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 Is a Base64 Data URI, and When Should You Actually Use One
Embedding an image directly into your HTML or CSS instead of linking to a file — useful in a few specific cases, and a bad idea in most others.