All Tools
Percentage Calculator
Calculate percentages instantly: find X% of Y, what percent X is of Y, or the percentage change between two numbers online.
Compound Interest Calculator
Calculate compound interest on savings and investments. See how your money grows with different rates, compounding frequencies, and time periods.
BMI Calculator
Calculate your Body Mass Index (BMI) with metric or imperial units. Get your BMI value and weight category: Underweight, Normal, Overweight, or Obese.
Tip Calculator
Calculate tip amounts and split bills between friends. Choose from preset tip percentages or enter a custom rate, then divide evenly.
VAT Calculator
Add or remove VAT from any amount. Includes Dutch VAT presets (21%, 9%, 6%) and a custom rate option. Instantly see net, VAT, and gross values.
Length Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles instantly with our free length converter.
Weight Converter
Convert between milligrams, grams, kilograms, ounces, pounds, stone, and tons instantly with our free online weight converter tool.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, and Kelvin instantly. Free online temperature converter with accurate results.
Currency Converter
Convert between USD, EUR, GBP, JPY, CAD, AUD, CHF, and CNY with our free currency converter. Static demo rates for quick estimation.
Word Counter
Count words, characters, sentences, and paragraphs in your text instantly. Free online word counter with reading time estimation.
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, or snake_case instantly. Free online text case converter.
JSON Formatter
Format, validate, and minify JSON online for free. Pretty print JSON with proper indentation or compress it into a single line.
Password Generator
Generate strong, random passwords with custom length and character options. Create secure passwords with uppercase, lowercase, numbers, and symbols.
QR Code Generator
Generate QR codes from any text or URL instantly. Customize the size and download your QR code as an SVG image for print or digital use.
UUID Generator
Generate random UUID v4 identifiers instantly. Create single or bulk UUIDs for databases, APIs, and software development projects.
Lorem Ipsum Generator
Generate lorem ipsum placeholder text in paragraphs, sentences, or words. Perfect for mockups, wireframes, and design prototyping.
Hash Generator
Generate cryptographic hashes using SHA-1, SHA-256, SHA-384, and SHA-512 algorithms. Hash any text securely in your browser using Web Crypto.
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports UTC, local time, ISO 8601 formats, and relative time display.
Color Code Converter
Convert color codes between HEX, RGB, and HSL formats instantly. Live color preview and easy copy for CSS, design tools, and development.