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Percentage CalculatorCalculate a percentage of a number instantly.→BMI CalculatorCalculate body mass index and a standard adult BMI category.→Compound Interest CalculatorProject investment growth with compound interest and regular contributions.→Loan CalculatorEstimate monthly loan payments, total interest, and total repayment.→Mortgage CalculatorEstimate mortgage payments including optional property tax and insurance.→Age CalculatorCalculate exact age in years, months, and days.→Word CounterCount words, characters, sentences, paragraphs, and estimated reading time.→JSON Formatter & ValidatorFormat, validate, and inspect JSON in your browser.→Password GeneratorGenerate strong random passwords with configurable character sets.→QR Code GeneratorCreate a static QR code for a URL or text.→Image CompressorCompress JPG, PNG, or WebP images locally in your browser.→Length ConverterConvert length units instantly.→
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Percentage CalculatorCalculate a percentage of a number instantly.→Percentage Change CalculatorFind percentage increase or decrease between two values.→Discount CalculatorCalculate sale price and money saved after a discount.→Tip CalculatorCalculate a tip and split the bill between people.→Simple Interest CalculatorCalculate simple interest and final balance.→Compound Interest CalculatorProject investment growth with compound interest and regular contributions.→Loan CalculatorEstimate monthly loan payments, total interest, and total repayment.→Mortgage CalculatorEstimate mortgage payments including optional property tax and insurance.→ROI CalculatorMeasure return on investment as a percentage and profit amount.→Markup CalculatorCalculate selling price from cost and markup percentage.→Profit Margin CalculatorCalculate profit margin from revenue and cost.→VAT CalculatorAdd or remove VAT from a price at any rate.→Salary to Hourly CalculatorConvert annual salary to hourly, daily, weekly, and monthly pay.→Fuel Cost CalculatorEstimate trip fuel usage and fuel cost.→MPG ↔ L/100km ConverterConvert fuel economy between MPG and liters per 100 km.→BMI CalculatorCalculate body mass index and a standard adult BMI category.→BMR CalculatorEstimate basal metabolic rate using the Mifflin-St Jeor equation.→TDEE CalculatorEstimate total daily energy expenditure from BMR and activity level.→Calorie Deficit CalculatorEstimate a daily calorie target from maintenance calories and desired weekly change.→Ideal Weight CalculatorEstimate reference body weight from height using common formulas.→Water Intake CalculatorEstimate a simple daily water intake target from body weight.→Running Pace CalculatorCalculate running pace, speed, or finish time from distance and time.→Sleep Cycle CalculatorEstimate wake-up or bedtime options using 90-minute sleep cycles.→Age CalculatorCalculate exact age in years, months, and days.→Date Difference CalculatorFind the number of days between two dates.→Time Duration CalculatorCalculate the duration between two clock times.→Hours & Minutes to DecimalConvert hours and minutes to decimal hours and back.→Unix Timestamp ConverterConvert Unix timestamps to human-readable dates and back.→Average CalculatorCalculate mean, sum, count, minimum, and maximum for a list of numbers.→Median CalculatorCalculate the median of a list of numbers.→Standard Deviation CalculatorCalculate population and sample standard deviation.→Quadratic Equation SolverSolve ax² + bx + c = 0 and show real or complex roots.→Pythagorean Theorem CalculatorFind the missing side of a right triangle.→Random Number GeneratorGenerate random integers within a range.→GPA CalculatorCalculate weighted GPA from grades and credit hours.→Final Grade CalculatorFind the score needed on a final exam to reach a target course grade.→Length ConverterConvert length units instantly.→Weight ConverterConvert weight units instantly.→Temperature ConverterConvert temperature units instantly.→Area ConverterConvert area units instantly.→Volume ConverterConvert volume units instantly.→Speed ConverterConvert speed units instantly.→Data Storage ConverterConvert data storage units instantly.→Time Unit ConverterConvert time unit units instantly.→Pressure ConverterConvert pressure units instantly.→Energy ConverterConvert energy units instantly.→Word CounterCount words, characters, sentences, paragraphs, and estimated reading time.→Character CounterCount characters with or without spaces.→Case ConverterConvert text to uppercase, lowercase, title case, sentence case, camelCase, or snake_case.→Slug GeneratorTurn a title or phrase into a clean URL slug.→Find & Replace ToolFind and replace text instantly, with optional case sensitivity.→Remove Duplicate LinesRemove repeated lines while preserving the original order.→Sort Lines ToolSort lines alphabetically, numerically, by length, or reverse them.→Reading Time CalculatorEstimate reading and speaking time from text length.→Lorem Ipsum GeneratorGenerate placeholder paragraphs for layouts and mockups.→JSON Formatter & ValidatorFormat, validate, and inspect JSON in your browser.→JSON MinifierMinify valid JSON to a compact single-line form.→Base64 Encoder / DecoderEncode text to Base64 or decode Base64 back to text.→URL Encoder / DecoderEncode or decode URL components safely.→UUID GeneratorGenerate one or many cryptographically random UUID v4 values.→Password GeneratorGenerate strong random passwords with configurable character sets.→SHA-256 Hash GeneratorGenerate a SHA-256 hash from text entirely in your browser.→Number Base ConverterConvert numbers between binary, octal, decimal, and hexadecimal.→Regex TesterTest regular expressions against text and inspect matches.→HTML Entity Encoder / DecoderEncode special HTML characters or decode HTML entities.→JWT DecoderDecode JWT header and payload locally without verifying the signature.→HEX / RGB / HSL Color ConverterConvert colors between HEX, RGB, and HSL formats.→QR Code GeneratorCreate a static QR code for a URL or text.→Image ResizerResize JPG, PNG, or WebP images in your browser.→Image CompressorCompress JPG, PNG, or WebP images locally in your browser.→Image to Base64Convert an image file to a Base64 data URL locally.→
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