Calculators & Converters
Made Simple
Fast, accurate tools for developers, students, and professionals. Everything runs in your browser — nothing sent to a server.
Featured Tools
Base64 Encoder
Dev ToolsEncode text or binary data to Base64 online. Instantly convert plain text to Base64 format for use in APIs, data URIs, and email attachments.
Open tool →BMI Calculator
CalculatorsCalculate your Body Mass Index (BMI) in metric or imperial units. Includes BMI category and healthy weight range for your height.
Open tool →Celsius to Fahrenheit Converter
ConvertersConvert Celsius to Fahrenheit instantly. Free online °C to °F converter with accurate results.
Open tool →JSON Formatter & Validator
Dev ToolsFormat, validate, and beautify JSON online. Instantly detect syntax errors and pretty-print JSON data.
Open tool →KG to LBS Converter
ConvertersConvert kilograms to pounds instantly. Free online kg to lbs converter with accurate results.
Open tool →KM to Miles Converter
ConvertersConvert kilometers to miles instantly. Free online km to miles converter with accurate results.
Open tool →Password Generator
Dev ToolsGenerate strong, random passwords online. Customize length (8–128), character sets, and see real-time password strength. Runs entirely in your browser.
Open tool →Percentage Calculator
CalculatorsCalculate percentages easily with three modes: find what X% of Y is, find what percentage X is of Y, or find the total when X is Y% of it.
Open tool →Tip Calculator
CalculatorsCalculate the tip amount, total bill, and per-person split for any number of people. Quick tip buttons for 10%, 15%, 18%, 20%, and 25%.
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