Free Online Tools & Utilities
Powerful online tools to boost your productivity and creativity
Featured Tools
Handpicked tools to supercharge your workflow
Online Ruler
Measure objects on your screen in centimeters or inches with precise calibration. Place your item against the ruler and read the measurement.
Barcode Reader
Scan and decode barcodes from images or your camera. Supports EAN-13, UPC-A, Code 128, and many more formats instantly.
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.
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.
Calculator
Perform quick calculations with standard and scientific modes. Supports keyboard input, calculation history, and works on all devices.
Dice Roller
Roll virtual dice online — D4, D6, D8, D10, D12, D20, D100, or custom. Animated 3D dice, sound effects, and roll history.
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
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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 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.
Calculate your Financial Independence number and estimate when you can retire early based on savings, income, expenses, and investment returns.
Calculate profit, selling price, ROI, and breakeven for dropshipping products with all fees included.
Calculate selling prices, profit margins, and cost breakdowns for print-on-demand products with platform-specific fee presets.
Generate random coupon codes with custom prefix, length, and format. Manage codes with search, filter, and usage tracking.
Calculate the optimal reorder point for your inventory based on daily demand, lead time, and safety stock to prevent stockouts.
Check love and friendship compatibility between any two zodiac signs with detailed score breakdowns and relationship tips.
Discover your spirit animal through a fun personality quiz. Answer 12 questions to reveal the animal that represents your inner spirit.
Create structured SKU codes from product attributes like category, brand, color, and size with smart abbreviations.
Calculate seller fees, payment processing costs, and net profit for Amazon, eBay, Etsy, and Shopify marketplaces.
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...