Online tools that just work — no sign-up, no fuss

Fast calculators, converters and generators, right in your browser. Free and nothing to install.

HealthBMI CalculatorCalculate your Body Mass Index from your weight and height, in metric or imperial units, and see which category you fall into.EducationPercentage CalculatorWork out percentages three ways: what X% of a value is, what one number is as a percentage of another, and the percentage change between two values.TextWord and Character CounterCount words, characters, sentences and paragraphs in any text in real time, with a reading-time estimate.ConvertersKilometers to Miles ConverterConvert kilometers to miles and miles to kilometers instantly, in both directions, with precision.GeneratorsSecure Password GeneratorCreate strong, random passwords with the length and character types you choose. Generated in your browser, never sent to a server.DevelopmentJSON Formatter and ValidatorFormat, indent and validate JSON in your browser. Points out the error with line and column when the text is invalid.DevelopmentBase64 Encoder and DecoderEncode text to Base64 or decode Base64 back to text, with full support for accents and emojis. Everything in your browser.GeneratorsQR Code GeneratorCreate a QR code from a link, text or Wi-Fi details and download the image as a PNG. Fast, free and in your browser.DevelopmentHash Generator (MD5, SHA-1, SHA-256, SHA-512)Generate the hash of any text in MD5, SHA-1, SHA-256 and SHA-512 at once. Computed in your browser.DevelopmentColor Converter (HEX, RGB and HSL)Convert colors between HEX, RGB and HSL, with a visual picker and preview. Edit any format and the others update instantly.DevelopmentUUID Generator (v4)Generate random UUIDs (version 4) one at a time or in bulk, ready to copy. Created securely in your browser.DevelopmentRegex TesterTest regular expressions in real time, with matches highlighted in the text and a match count.DevelopmentNumber Base ConverterConvert numbers between decimal, binary, hexadecimal and octal. Type in any base and the others update instantly.TextText Case ConverterTurn text into UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case and more, all at once.DevelopmentCSS, HTML and SQL FormatterMake CSS, HTML and SQL clean and readable with automatic indentation. Paste the code, pick the language and format.ConvertersTemperature ConverterConvert temperatures between Celsius, Fahrenheit and Kelvin. Type in any scale and the others update instantly.ConvertersUnit ConverterConvert units of weight, volume, area and speed at once. Enter a value and see the equivalent in every unit of the category.ConvertersTime Zone ConverterSee what time it is in cities around the world at once. Pick a date, time and reference zone and compare side by side.UtilitiesAge CalculatorFind out an exact age in years, months and days from a date of birth, plus the total number of days lived.UtilitiesDate CalculatorAdd or subtract days, weeks, months or years from a date and find the resulting date, with the weekday.

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Interest, discounts, loans and everyday money math.

BMI, calories, hydration and other wellness calculations.

Everyday math: percentages, averages, rule of three and more.

Count, clean, transform and organize text in seconds.

Tools for developers: JSON, Base64, hashes, regex and more.

Convert units of measurement precisely in one click.

Passwords, QR codes, test data and other handy generators.

Dates, random pickers, timers and everyday helpers.