Utility Tools

42 tools — all free, all in-browser.

Password Strength CheckerScore your password strength and generate stronger ones.Use Tool →Password GeneratorGenerate strong random passwords with configurable length and character sets.Use Tool →Decision MakerLet the tool randomly pick from your list of options.Use Tool →Yes or No WheelSpin a wheel for a random yes or no answer.Use Tool →My Screen SizeDetect your current screen resolution and aspect ratio.Use Tool →Screen Sizes ReferenceCommon Apple device screen sizes and resolutions.Use Tool →Aspect Ratio CalculatorCalculate reduced aspect ratios and proportional dimensions.Use Tool →String CalculatorAnalyze text statistics: characters, words, lines, paragraphs.Use Tool →Roman Numeral ConverterConvert numbers to Roman numerals and Roman numerals to numbers.Use Tool →Readability Score CalculatorCalculate Flesch, FK Grade, Gunning Fog, and SMOG readability scores.Use Tool →Number to Words ConverterConvert numeric values into English words, including negatives and decimals.Use Tool →Temperature ConverterConvert between Celsius, Fahrenheit, Kelvin, and Rankine instantly.Use Tool →Unit ConverterConvert between metric and imperial units for length, weight, volume, and area.Use Tool →StopwatchOnline stopwatch with lap tracking, split times, and best/worst lap highlighting.Use Tool →Random Number GeneratorGenerate random integers or decimals within any range, with no-duplicate and sort options.Use Tool →Statistics CalculatorCalculate mean, median, mode, standard deviation, variance, and more from a list of numbers.Use Tool →GPA CalculatorCalculate your weighted GPA from courses, letter grades, and credit hours on a 4.0 scale.Use Tool →Coin FlipFlip a virtual coin online for a random heads or tails result. Supports multi-flip mode and tracks your heads/tails statistics.Use Tool →Online TimerFree online countdown timer with hour, minute, and second input, quick presets, and an audio alarm when time is up.Use Tool →Image ResizerResize any image in your browser — set dimensions, choose JPEG, PNG, or WebP format, and download the result. Nothing uploaded.Use Tool →Tally CounterFree online tally counter with multiple named counters. Click to increment, decrement, or reset each counter independently.Use Tool →Noise GeneratorPlay white, pink, or brown noise to help you focus, relax, or fall asleep. Generated in your browser using the Web Audio API.Use Tool →Number Sequence GeneratorGenerate Fibonacci, prime, powers of 2, triangular, square, cube, factorial, arithmetic, and geometric sequences. Copy as a comma-separated list or with custom separators.Use Tool →Times Table GeneratorGenerate the multiplication table for any number from 1 to 20. Choose how far to count, hover rows to highlight them, and copy the full table as plain text.Use Tool →BPM Tap CounterTap in rhythm to calculate beats per minute (BPM).Use Tool →Number FormatterFormat any number in 14 different ways — US/EU/Indian locale, currency, scientific notation, engineering, words, binary, hex, octal, and more.Use Tool →Interactive Periodic TableExplore all 118 elements of the periodic table. Click any element to see atomic number, symbol, name, mass, and category. Search and filter by element type.Use Tool →Fuel Efficiency ConverterConvert fuel efficiency between MPG (US), MPG (UK), L/100km, and km/L. Includes a trip cost calculator — enter distance and fuel price to estimate total fuel spend.Use Tool →Shoe Size ConverterConvert shoe sizes between US, UK, EU, CM, and Japanese sizing for men, women, and kids. Full size charts included — find your equivalent size in any system instantly.Use Tool →Triangle CalculatorSolve any triangle using SSS, SAS, ASA, or AAS. Calculate all missing sides, angles, area, and perimeter with an SVG visualization and triangle type detection.Use Tool →Random Name GeneratorGenerate random full names, first names, or last names. Choose male, female, or any gender across 7 nationalities — English, Spanish, French, German, Japanese, Arabic, and Italian.Use Tool →List RandomizerShuffle any list instantly. Paste items one per line, randomize the order, or pick a single random item. Perfect for random order, name draws, playlist shuffles, or deciding who goes first.Use Tool →Username GeneratorGenerate unique usernames in gamer, professional, cute, or random styles. Add a keyword, toggle numbers, and get dozens of ideas at once. Shows character limits for major platforms.Use Tool →Quadratic Formula CalculatorSolve quadratic equations (ax² + bx + c = 0) with step-by-step solutions. Get real and complex roots, discriminant, vertex, and parabola direction. Free quadratic equation solver.Use Tool →PPI CalculatorCalculate pixels per inch (pixel density) for any screen. Enter resolution and screen size to get PPI, PPCM, megapixels, and dot pitch. Also converts pixels to inches, cm, and mm.Use Tool →Passphrase GeneratorGenerate strong, memorable passphrases using random words. Customize word count, separators, and capitalization. See entropy and estimated crack time.Use Tool →File Size ConverterConvert file sizes between bytes, KB, MB, GB, TB, and more in both SI (decimal) and IEC (binary) notation. Instantly compare how drive manufacturers vs. operating systems measure storage.Use Tool →Download Time CalculatorCalculate how long it takes to download any file at a given internet speed. Supports Kbps, Mbps, Gbps, and MB/s with quick presets for 3G, 4G, 5G, and broadband.Use Tool →Circle CalculatorEnter any one property of a circle — radius, diameter, area, or circumference — and instantly calculate all the others using standard geometry formulas.Use Tool →Square Footage CalculatorCalculate the total square footage of one or more rooms. Supports rectangular, triangular, and circular shapes. Add multiple rooms and get instant totals in ft² and m².Use Tool →Uptime & SLA CalculatorCalculate the maximum allowed downtime for any uptime SLA percentage. See how much downtime is permitted per year, month, week, and day for 99%, 99.9%, 99.99% and custom SLAs.Use Tool →IBAN Validator & ParserValidate and parse IBAN numbers — check format, verify the checksum, and extract country and BBAN.Use Tool →