LunoX HubletFrom quick calculators and format converters to plain-language explainers — everything runs in your browser, so your data never leaves your device.
LunoX Hublet is a hub of free online tools, practical guides, and everyday knowledge for anyone trying to get something done — students working through homework, office workers wrestling with Excel, or newcomers making sense of a new piece of technology. There's nothing to install and no account to create: every tool, from percentage calculators to word counters, QR generators, and file converters, runs directly in your browser, so nothing you type or upload ever touches a server. Alongside the tools, LunoX Hublet offers step-by-step guides, short plain-language explainers for confusing terms, and side-by-side comparisons to help you pick the right option with confidence. New content is added regularly, everything is free, and there's no limit on how much you can use.
5 core spaces intentionally structured for high-frequency workflows.
Calculators, converters, QR generators, and 120+ more utilities running right on your device.
120+ toolsStep-by-step instructions with clear examples, visuals, and cheat sheets.
45 guidesShort, plain-language explainers for hundreds of technical terms.
200+ termsX or Y? Clear side-by-side comparisons, with no vendor bias.
80+ comparisonsFresh perspectives, tool updates, and workflow shifts.
Published dailyQuickly calculate percentages, compound interest, margins, and discounts.
Count words, characters, paragraph density, and estimated reading time.
Create crisp vector QR codes for links, wifi credentials, and contact cards.
Convert images to PDF right in your browser, with no file size caps.
Calculate exact age, days lived so far, and your next birthday milestone.
Beautify, inspect tree structures, validate syntax, and compress JSON instantly.
Calculate your savings and final price without leaving the homepage. Results update instantly as you type.
A short explainer on how caching works, why it speeds up the web, and when you should clear it.
Lesser-known shortcuts that come in handy every day at the office.
Comparing the two most common document formats and when each one wins.
Yes. Every tool, guide, and piece of knowledge on LunoX Hublet is free, with no usage limits and no account required.
No. Every tool runs directly in your browser — nothing you enter, upload, or process is sent to any server.
Yes, the entire site is responsive and works well on phones, tablets, and desktops alike.
Yes, we publish new tools, guides, and articles on a regular basis.
Yes, the whole site is bilingual (Vietnamese and English) — you can switch languages anytime from the top-right corner.
Zero telemetry. Pure private computation. No server uploads, no cookies tracking your calculations, and no third parties touching your data.