Get things done with calculators, converters, and design utilities - or take a break with word games, puzzles, and arcade classics. No sign-up required; what you type in our tools stays on your device and is not sent to our servers.
Tools and games built for speed, privacy, and zero friction.
Tool inputs and data you enter locally are handled in your browser - not sent to our servers for processing.
No loading screens or server round-trips for tools. Games load fast and run entirely client-side.
Jump into games with no install - same privacy-friendly, in-browser experience as our tools.
Every tool and game is free to use. No sign-up, no paywalls, no premium tiers.
Fully responsive design that works on phones, tablets, and desktops.
Jump straight in — no registration, no email, no profile. Just open and use.
New tools and games are added regularly — bookmark and check back often.
Follows your system preference automatically — works great in light and dark mode.
Oneyfy brings together over 100 productivity tools and 85 browser games in one place — all free, all instant, no sign-up needed. Need to calculate your BMI, format a JSON file, generate a secure password, or compress an image? It's here. Want to take a break with a word puzzle or a round of classic Snake? That's here too. Everything runs directly in your browser, so you're not waiting for server round-trips or downloading anything. Just open the page and go.
The tool categories cover a lot of ground: calculators and converters for everyday math, health tools for tracking wellness metrics, text utilities for writers and students, developer tools for quick JSON formatting or regex testing, image and design tools for visual work, and more. On the games side, there's word games, logic puzzles, arcade classics, memory challenges, strategy games, and skill tests — all running smoothly on desktop or mobile.
Every tool runs in your browser tab using JavaScript. When you enter data — a weight for the BMI calculator, an image to resize, code to format — that data is processed locally on your device. Nothing you type or upload gets sent to our servers. Results appear instantly, your information stays private, and the tools work fine even on a slow connection. That last part matters most for things like the password generator and encryption utilities: the server genuinely never sees what you're creating.
All games are self-contained HTML5 applications — no plugins, no Flash, no app store. You click a game, it loads in seconds, and you start playing. High scores and progress are saved in your browser's localStorage, so your Snake best score or Wordle win streak carries over between sessions on the same device. The range is wide: logic puzzles like Sudoku and Minesweeper, reflex games like Flappy Bird and Typing Speed, strategic classics like Chess. Something for most moods.
Creating an account to use a calculator or play a quick game is friction that serves no one. So there isn't one. No email to verify, no password to remember, no profile to manage. Your game scores save locally. Dark mode preference is remembered the same way. No newsletter, no marketing emails, no user identity tied to anything. You open what you need and use it — that's the whole thing.
Students reach for the calculators, unit converters, GPA calculator, and grade calculator. Developers use the JSON formatter, regex tester, diff checker, Base64 encoder, and JWT decoder on a daily basis. Health-focused users check BMI, calorie intake, or body fat percentage. Writers use the word counter, case converter, and readability tools. Designers grab the color picker, gradient generator, or CSS box shadow tool. And when anyone needs five minutes away from the screen, the games are always a click away.