Free Online Tools & Utilities
Powerful online tools to boost your productivity and creativity
Featured Tools
Handpicked tools to supercharge your workflow
Calculator
Perform quick calculations with standard and scientific modes. Supports keyboard input, calculation history, and works on all devices.
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.
Multi Stopwatch
Run multiple stopwatches simultaneously with lap timing. Track workouts, racing, study sessions, or any timed activities with precision.
QR Code Generator
Create customizable QR codes for URLs, WiFi, contacts, email, SMS, locations, events, and crypto addresses. Download as PNG, SVG, or JPG.
Typing Speed Test
Test your typing speed and accuracy. Measure WPM (words per minute), CPM (characters per minute), and track progress with real-time stats.
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.
Event Countdown
Create countdowns for any event - birthdays, weddings, holidays, or custom dates. Choose from 20+ themed timers with visual effects.
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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
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.
Estimate total project costs by adding team members with hourly rates, fixed expenses, contingency buffer, profit margin, and tax.
Stay focused with a Pomodoro timer featuring customizable intervals, session tracking, daily stats, and immersive ambient themes.
Calculate the exact trades needed to rebalance your investment portfolio to target allocations, with optional new cash contributions.
Calculate cryptocurrency profit, loss, and ROI from your trades. Enter buy price, sell price, quantity, and fees to see your net returns instantly.
Calculate total investment returns with compound interest, CAGR, and monthly contributions. Adjust for inflation and taxes to see your real projected growth.
Calculate stock trading profit or loss including brokerage commissions, capital gains tax, ROI, and break-even sell price.
Calculate dividend income, yield on cost, and compound growth with reinvestment (DRIP). Simulate long-term returns with tax, contribution, and price appreciation adjustments.
Simulate DCA investment returns over any time period. Compare stock and Bitcoin strategies with lump sum investing.
Latest Tutorials
Step-by-step guides to get the most out of our tools
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...