ViralScopeHubFree online tools, calculators and games
82 simple tools that work right in your browser. No sign-up, no downloads, and nothing you type is uploaded.
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FinanceMortgage, loans, savings and tax11 toolsHealthBMI, calories, water and due date5 toolsMath & DatesPercentages, age and days between dates5 toolsTextCount words, change case, compare text7 toolsDeveloperJSON, Base64, regex and hashes7 toolsConvertersUnits, time zones and Roman numerals5 toolsGeneratorsPasswords, random numbers and dice6 toolsImageResize, shrink and convert photos4 toolsGamesChess, solitaire, puzzles and arcade23 toolsSkill TestsTyping, reaction, aim and memory5 toolsUtilitiesTimers, notepad and decision wheel4 tools
Popular this week
Our hand-picked favourites for this week.
New games
All 23 games →NewChessPlay a full game of chess against a computer opponent you can set from beginner to hard.NewCheckersClassic checkers against the computer or a friend, with forced jumps and kings.NewSolitaireThe classic card game for one: build the four suits from ace to king.NewFour in a RowDrop discs into the grid and be first to line up four of your colour.NewTower DefenseBuild towers beside the road and stop every wave before it reaches your base.NewBlock BuilderBuild anything you like from coloured blocks in a relaxing 2D sandbox.
💰 Finance Calculators
See all 11 →Mortgage, loans, savings and tax
Mortgage CalculatorWork out your monthly mortgage payment, total interest and yearly balance in seconds.Loan EMI CalculatorFind the monthly installment (EMI) for any loan and see how much interest you will pay.Compound Interest CalculatorProject the future value of your savings or investments with compounding and regular deposits.Savings CalculatorProject your savings balance and find out how long it takes to hit a target amount.Retirement CalculatorCheck whether you are on track for retirement and how much extra to save each month.Sales Tax, GST & VAT CalculatorAdd tax to a price or remove it from a tax-inclusive total in one step.Discount CalculatorSee the final price after one or two discounts and tax, and how much you save.Salary & Hourly Wage CalculatorConvert any pay rate into hourly, weekly, monthly and annual figures.Inflation CalculatorFind out what today’s money will be worth, and what things will cost, after years of inflation.Tip CalculatorWork out the tip and each person’s share of the bill quickly.Profit Margin CalculatorUnderstand profit margin versus markup and find the right selling price.
❤️ Health & Fitness
See all 5 →BMI, calories, water and due date
BMI CalculatorCalculate your BMI, see what category it falls in and find a healthy weight range for your height.Calorie Calculator (TDEE)Estimate how many calories your body burns each day and what to eat for your goal.Water Intake CalculatorEstimate your daily water needs from your weight, exercise and climate.Pregnancy Due Date CalculatorEstimate your due date, trimester milestones and how far along you are.Body Fat CalculatorEstimate your body fat percentage with just a tape measure.
📅 Math & Dates
See all 5 →Percentages, age and days between dates
Percentage CalculatorSolve the four most common percentage problems instantly.Average CalculatorGet mean, median, mode, range and standard deviation for any list of numbers.Age CalculatorFind your exact age and how many days remain until your next birthday.Date Difference CalculatorCount the days, weeks, months and business days between any two dates.Countdown Timer to a DateCount down the days, hours, minutes and seconds to any event.
📝 Text Tools
See all 7 →Count words, change case, compare text
Word CounterCount words, characters, sentences and paragraphs, and estimate reading time.Character CounterCount characters and see how close you are to common platform limits.Case ConverterChange the capitalization of any text to the style you need in one click.Lorem Ipsum GeneratorGenerate dummy text in paragraphs, sentences or words for your designs.Text Diff CheckerCompare two texts and see exactly what was added or removed.Remove Duplicate LinesClean a list by removing repeated lines, empty lines and extra spaces.Slug GeneratorConvert any title into a clean, SEO-friendly URL slug.
💻 Developer Tools
See all 7 →JSON, Base64, regex and hashes
JSON Formatter & ValidatorBeautify, minify and validate JSON with clear error messages.Base64 Encoder & DecoderEncode or decode Base64 text with full Unicode support.URL Encoder & DecoderPercent-encode or decode URLs and inspect query parameters.UUID GeneratorCreate secure random UUIDs (GUIDs) one at a time or in bulk.Hash Generator (MD5, SHA-256)Create MD5 and SHA hashes of text or files without uploading anything.Regex TesterTest and debug regular expressions with live highlighting and capture groups.Color Picker & ConverterPick a color and convert it between HEX, RGB and HSL with a contrast check.
🔄 Converters
See all 5 →Units, time zones and Roman numerals
Unit ConverterConvert length, weight, temperature, volume, speed and area in one place.Time Zone ConverterConvert a time between zones and see it in cities around the world.Number to Words ConverterSpell out any number in English words, including cheque-style amounts.Roman Numeral ConverterConvert between numbers and Roman numerals in either direction.Binary, Hex & Decimal ConverterConvert numbers between binary, octal, decimal and hexadecimal in one step.
🎲 Generators
See all 6 →Passwords, random numbers and dice
Password GeneratorGenerate strong random passwords right in your browser.Random Number GeneratorGenerate one or many random numbers in any range.Random Name GeneratorGenerate random names for characters, test data and creative projects.Random PickerPaste a list and pick one or more random winners, or shuffle the order.Coin FlipFlip a fair coin, or many coins at once, and keep a running tally.Dice RollerRoll any combination of dice using standard dice notation.
🖼️ Image Tools
See all 4 →Resize, shrink and convert photos
Image ResizerResize any photo by pixels or percentage, entirely in your browser.Image CompressorShrink the file size of photos with adjustable quality, right in your browser.JPG to PNG & PNG to JPG ConverterConvert JPG to PNG, PNG to JPG, or either to WebP — in bulk and in your browser.WebP ConverterTurn JPG and PNG images into lightweight WebP files for faster pages.
🎮 Free Online Games
See all 23 →Chess, solitaire, puzzles and arcade
2048Slide tiles, merge matching numbers and chase the 2048 tile.SudokuFill the 9×9 grid so every row, column and box contains 1 to 9.Tic-Tac-ToeClassic noughts and crosses against the computer or a friend.Memory MatchFlip cards, find matching pairs and clear the board in as few moves as you can.SnakeGuide the snake to the food without hitting the walls or your own tail.MinesweeperUncover every safe square without detonating a mine.Word GuessFind the hidden five-letter word in six guesses using colour clues.HangmanGuess the hidden word one letter at a time before you run out of tries.Block PuzzleFit shapes onto the board and clear full lines before you run out of space.Trivia QuizAnswer ten multiple-choice questions and see how much you really know.Block BuilderBuild anything you like from coloured blocks in a relaxing 2D sandbox.Gem Miner Idle ClickerTap to mine gems, buy upgrades and let your miners earn while you are away.Tower DefenseBuild towers beside the road and stop every wave before it reaches your base.Endless RunnerRun as far as you can, jumping crates and ducking drones as you go faster.Wing FlapTap to flap, glide through the gaps and try not to touch a thing.Pixel HopperRun and jump through three levels, collecting coins on the way to the flag.Tiny FarmPlant, water and harvest crops, sell them and grow your little farm.Space ShooterFly your ship, shoot waves of alien craft and collect power-ups to survive.ChessPlay a full game of chess against a computer opponent you can set from beginner to hard.CheckersClassic checkers against the computer or a friend, with forced jumps and kings.SolitaireThe classic card game for one: build the four suits from ace to king.Four in a RowDrop discs into the grid and be first to line up four of your colour.Paddle DuelBounce the ball past your opponent in a fast, classic paddle-and-ball duel.
⚡ Skill Tests
See all 5 →Typing, reaction, aim and memory
Typing Speed TestMeasure your typing speed in words per minute and your accuracy.Reaction Time TestClick as soon as the box turns green and see your reaction time in milliseconds.Aim TrainerClick moving targets for 30 seconds to test your aim and speed.Memory TestWatch the pattern, repeat it from memory, and see how many levels you can reach.Math Speed ChallengeAnswer as many mental-math questions as you can in 60 seconds.
🧰 Utilities
See all 4 →Timers, notepad and decision wheel
Stopwatch & Countdown TimerA precise stopwatch with laps and a countdown timer with a sound alert.Online NotepadJot down notes that save automatically on your device, with no account needed.Pomodoro TimerStay focused with timed work sessions and regular short breaks.Decision WheelAdd your options, spin the wheel and let chance decide.
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Latest guides
- Beginner Tips for Chess, Checkers and Four in a Row — Simple, practical strategy tips for three classic board games, plus how to use a computer opponent to learn faster instead of just losing.
- How to Improve Your Typing Speed and Accuracy — Understand WPM, learn proper finger placement, and follow a practical practice plan to type faster with fewer mistakes.
- Image Size for the Web: Resize, Compress, Format — Why image weight matters for speed, how to pick JPG, PNG or WebP, and how to resize and compress images privately in your browser.
- Brain Games and Skill Tests: Do They Really Help? — What reaction time, memory and typing tests can measure, typical scores, and how to use quick games for focus and fun without hype.
- Unit Conversion Cheat Sheet: Metric and Imperial — Handy conversion factors for length, weight, volume and temperature, plus tips for converting without mistakes.
- How to Create Strong Passwords (and Remember Them) — What makes a password strong, why length beats complexity, how passphrases and password managers help, and what to avoid.
About ViralScopeHub
ViralScopeHub is a free collection of calculators, converters, text and image tools, games and skill tests. Every page starts with a one-line explanation of how to use it, followed by a fuller guide and answers to common questions. Everything runs on your own device, so your numbers, text and photos stay private. The pages are light enough to work well on a slow mobile connection, and you can add the site to your home screen from your browser menu. The moon button at the top switches to dark mode.