Practical guides for free online tools. 456 articles — page 1 of 38.
Your server logs show the same crash at 12:34:56 in New York and at 17:34:56 in Berlin, and you're trying to figure out who hit the API when. Without Unix timestamps, you'll guess wrong.
Your QA team lives in spreadsheets and your tests live in JSON. You can either retype every row or you can convert the CSV to JSON once and use it everywhere — here's the workflow that actually scales.
Your blog feeds have unreadable XML because half the entities are double-encoded and the other half are stripped. RSS parsers are strict — here's how to escape once and only once.
Christmas is always December 25, but Easter bounces between March 22 and April 25. The reason isn't random — it's a 1,600-year-old algorithm balancing lunar cycles, equinox, and the day of the week.
A counterparty sends you a redlined contract as a clean PDF — no track changes, no comments, just the new version. A text diff is the only way to see what they actually changed.
Your Instagram bio has fancy text in 𝓯𝓪𝓷𝓬𝔂 fonts and it looks great. The search engine sees something completely different — sometimes nothing readable at all.
Your desktop is just there — until it isn't. A rotating daily wallpaper is a tiny free habit that shifts how your workday feels, and the science backs it up.
Every marketing team argues about which metric to track. ROI, ROAS, ROMI — they sound similar, but they measure different things and lead to different decisions.
A UUID is a UUID, right? Not quite — v1, v4, and v7 generate them completely differently and have different trade-offs. Pick the wrong one and you'll regret it later.
A text repeater sounds like a spam tool. Use it for i18n testing and it becomes one of the fastest ways to find layout bugs before your translators even start.
Time zones seem like an obvious idea — they weren't. The International Date Line even less so. Understanding why they exist makes a lot of travel confusion make sense.
APIs talk to each other in different naming conventions, and mixing them up causes bugs you'll stare at for hours. A case converter is the fastest way to keep your data clean at the boundary.