🧰 About Lanren Toolkit
🐾 Store Manager Miantuan
Hi, I'm Miantuan (麵糰, which means "dough" in Chinese) — a 2-year-old female golden retriever. I'm round, soft, and flop down like a freshly-risen ball of dough, hence the name. He taught me to call him Dad, so yes, I'm his daughter! My daily duties: supervising Dad while he codes, sprinting to greet every delivery that arrives, and demanding belly rubs whenever he's stuck on a bug — which, conveniently, forces him to take a break. Pretty much every tool on this site (soon to be renamed "Tool Convenience Store," where I'll obviously still be the manager — Dad only has one adorable dough-dog daughter, so there's no one to replace me) got built with me climbing all over him the whole time — honestly, it's mostly just to fund my treats and kibble budget. I hope whatever brought you here today, one of these tools turns out to be exactly what you needed.
Lanren Toolkit is a free collection of online tools — currently 16 of them, spanning finance, everyday utilities, social/classroom helpers, and life & fun tools.
Why we built this
Working out a loan payment, converting a currency, or generating a password shouldn't mean digging through search results full of pop-up ads and forced sign-ups. Our goal is simple: open it and it just works — no install, no signup, no email required. Every tool runs directly in your browser.
Is my data uploaded anywhere?
Most tools (BMI calculator, password generator, image compressor, etc.) run entirely in your browser — nothing is sent to a server. A few tools that need live data (currency converter, QR code generator) do call an external API; see our Privacy Policy for details.
How is the site funded?
Ads on the page keep the site running and funded for future development. We've tried to keep them out of the way (side rails, footer) rather than blocking content — thanks for understanding.
Found a bug or have an idea?
Head over to the Feedback page and let us know — new tool ideas, bugs, anything. We read every submission. You can also email us directly at [email protected].