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MathArea CalculatorMeasure rectangles, circles, triangles and trapezoids, then convert the result across common land area units.Open tool MathPercentage CalculatorSolve percentage-of, percentage-share, percentage-change and increase or decrease questions with clear formulas.Open tool CreatorYouTube Thumbnail ViewerPreview the public thumbnail sizes available for a YouTube video or Short using its link.Open tool ImageImage Resizer & CompressorResize JPG, PNG and WebP images locally in your browser and download an optimized file.Open tool FinanceCompound Interest CalculatorProject investment growth with recurring contributions and see how much comes from deposits versus growth.Open tool FinanceLoan & Payment CalculatorEstimate monthly loan payments, lifetime interest and the effect of extra repayments.Open tool FinanceDiscount CalculatorCalculate sale prices with one or two successive discounts and optional tax.Open tool HealthAdult BMI CalculatorCalculate adult body mass index in metric or US units and understand what it cannot tell you.Open tool HealthCalorie Needs EstimatorEstimate adult resting energy expenditure and maintenance calories using activity factors.Open tool TextWord & Character CounterCount words, characters, sentences, paragraphs and repeated words while typing, without uploading your text.Open tool TextLorem Ipsum GeneratorGenerate adjustable quantities of placeholder paragraphs for layout and design testing.Open tool DeveloperJSON Formatter & ValidatorFormat, minify and validate JSON locally with clear syntax error messages.Open tool MathScientific Math ToolkitEvaluate basic scientific expressions and solve primes, GCD/LCM, quadratic equations and descriptive statistics.Open tool EducationNegative Marking Score CalculatorEstimate test scores when correct answers earn points and wrong answers deduct marks.Open tool FinanceVAT & Sales Tax CalculatorAdd or remove a tax percentage and see the tax amount alongside the pre-tax and total price.Open tool FinanceTip & Bill Split CalculatorSplit a bill with a percentage tip across multiple people and see each person’s share.Open tool MathUnit ConverterConvert common distance, mass, temperature and area units with transparent conversion rules.Open tool ProductivityDate Difference CalculatorCount days and weeks between two calendar dates, with an option to include the final day.Open tool DeveloperSecure Password GeneratorCreate randomized passwords locally with configurable length and character groups.Open tool TextText Difference CheckerCompare two text blocks line by line to identify additions, deletions and unchanged lines.Open tool DesignColor Contrast CheckerCheck readable foreground and background color combinations against WCAG contrast thresholds.Open tool DeveloperCSV to JSON ConverterConvert small comma-separated tables to JSON objects entirely inside your browser.Open tool DeveloperURL Encoder & DecoderEncode or decode text for URL query components using standard percent-encoding.Open tool DeveloperPower Query M FormatterFormat Power Query M code locally with comments and quoted strings preserved.Open tool ↗DeveloperExcel Serial Date & Unix ConverterConvert Excel serial dates using 1900 or 1904 systems and compare Unix timestamps.Open tool ↗DeveloperExcel Column Letter & Number ConverterConvert A, AA and XFD to column indices and back.Open tool ↗DeveloperCSV Delimiter & Encoding InspectorInspect CSV delimiters, BOM, rows, column counts and quoted fields locally.Open tool ↗FinanceXIRR & XNPV Dated Cash Flow CalculatorCalculate dated cash-flow NPV and estimate internal rates of return with multiple-root warnings.Open tool ↗FinanceVAT Number Format CheckerCheck basic VAT number structure for EU countries, UK, Switzerland and Norway without sending data.Open tool ↗FinanceEU VAT Calculator by CountryAdd or remove standard VAT for 27 EU countries using a dated reference snapshot.Open tool ↗FinanceUK Flat Rate vs Standard VAT CalculatorCompare simplified UK Flat Rate Scheme VAT against standard VAT with limited-cost warnings.Open tool ↗FinanceCross-border VAT and Reverse Charge GuideCheck common EU, UK (Great Britain), Swiss and Norwegian cross-border VAT scenarios and digital-services OSS rules.Open tool ↗MathRegional Land Unit ConverterConvert rai, ngan, square wah, dunam, kanal, marla, acres and custom bigha.Open tool ↗
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