Free Online Tools & Utilities
Powerful online tools to boost your productivity and creativity
Featured Tools
Handpicked tools to supercharge your workflow
BAC Calculator
Estimate your blood alcohol content (BAC) using the Widmark formula. Enter your weight, gender, drinks consumed, and hours drinking to see your impairment level and time to sober.
Coin Flip
Flip virtual coins with realistic 3D animation. Choose Heads/Tails, Yes/No, or custom options with adjustable probability.
Online Ruler
Measure objects on your screen in centimeters or inches with precise calibration. Place your item against the ruler and read the measurement.
Event Countdown
Create countdowns for any event - birthdays, weddings, holidays, or custom dates. Choose from 20+ themed timers with visual effects.
World Clock
Display multiple clocks for different time zones around the world. Track time in major cities, add custom locations, and switch between digital, analog, and flip clock styles.
Dice Roller
Roll virtual dice online — D4, D6, D8, D10, D12, D20, D100, or custom. Animated 3D dice, sound effects, and roll history.
What Should I Eat
Can't decide what to eat? Let this random food picker choose for you! Pick from cuisines worldwide or create your own custom food list.
Holiday Calendar
Browse public holidays for 199 countries. Filter by holiday type, navigate years, and see the next upcoming holiday at a glance.
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Trending Tools
Most popular tools right now
Test your laptop touchpad functionality - detect taps, gestures, multi-touch, and pointer tracking in real-time.
Simulate hacking on screen with realistic code output. Type any key to display code from multiple programming languages with terminal effects.
Simulate realistic OS update screens fullscreen to prank friends. Supports Windows 11, Windows 10, macOS, and Ubuntu with BSOD and kernel panic effects.
Generate creative usernames for social media, gaming, and online accounts with multiple styles and multi-language wordlists.
Convert GPS coordinates between Decimal Degrees, DMS, DDM and UTM formats. Interactive map preview with click-to-get-coordinates feature.
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files. Compare hashes to verify file integrity.
Calculate subnet mask, network address, broadcast address, host range, and CIDR notation for IPv4 and IPv6 networks.
Test your keyboard for broken keys, ghosting, and rollover issues. Supports Full (100%), TKL (80%), and MacOS layouts with visual feedback.
Latest Tools
Freshly added to our collection
Create colorful sticky notes on a free-form canvas. Drag, resize, format text, and organize your thoughts visually.
Create and manage checklists for shopping, travel, moving, events, and more. Track progress, reorder items, and export as images.
Plan your day with time-block scheduling, prioritized tasks, notes, and easy data cloning between days.
Organize tasks visually with drag-and-drop columns and cards. Color-code columns, format card text, and rearrange your workflow with ease.
Track time spent on tasks and projects with a simple start/pause/stop timer, manual entries, weekly reports, and CSV export.
Track your daily habits, build streaks, and visualize your long-term progress with a monthly calendar heatmap.
Prioritize your tasks by urgency and importance using the Eisenhower Matrix. Organize work into four quadrants to focus on what matters most.
Take structured meeting notes with agenda, decisions, action items, and export to Markdown.
Calculate transaction fees, processing costs, and net amount received for PayPal, Stripe, and Square payment gateways.
Convert between cryptocurrency units instantly — Wei, Gwei, Ether for Ethereum and Satoshi, mBTC, BTC for Bitcoin.
Calculate potential impermanent loss for DeFi liquidity pools. Compare HODL vs LP value with weighted pool support and fee earnings offset.
Calculate your ideal freelance hourly, daily, and monthly rates based on income goals, work schedule, expenses, and taxes.
Latest Tutorials
Step-by-step guides to get the most out of our tools
Order of operations: how a calculator decides what to compute first
Type 2 + 3 × 4 and a calculator answers 14, not 20. Here is the priority ladder it follows every time — and the one rule...
Standard vs scientific calculator: what's different and which you need
Both calculators add 2 + 2 the same way. The real question is what happens when your math grows a square root, a sine or...
Why a calculator shows 0.1 + 0.2 = 0.30000000000000004
Type 0.1 + 0.2 and expect 0.3 — but the calculator shows 0.30000000000000004. Here is the specific binary reason this on...
Algebraic vs immediate-execution: two ways a calculator reads your keystrokes
Press 2 + 3 × 4 on different calculators and some show 14 while others show 20. The difference is not a bug — it is two...