Tools

Calculate the time between a date of birth and another date.

Date & Time Tools

Add or subtract days, hours, minutes, and seconds. Calculate time durations or add time to a specific date and time.

Date & Time Tools

Calculate percentages, percentage change, percentage increase, and percentage decrease quickly.

Calculators

Add, subtract, multiply, divide, simplify, and convert fractions with mixed numbers and decimals.

Calculators

Calculate your Body Mass Index using metric or imperial units and see your BMI category, healthy weight range, BMI Prime, and Ponderal Index.

Health & Fitness

Estimate your Basal Metabolic Rate and daily calorie needs using metric or imperial units.

Health & Fitness

Estimate daily calories for maintenance, weight loss, or weight gain.

Health & Fitness

Count words, characters, sentences, paragraphs, and estimated reading time as you write or paste text.

Text Tools

Format, minify, and validate JSON so structured data is easier to read and copy.

Developer Tools

Generate RFC 4122 version 4 UUIDs for development, testing, and sample data.

Generators

Encode plain text to Base64 or decode Base64 strings back to readable text.

Encoding Tools

Convert titles, headings, and phrases into clean lowercase URL-friendly slugs.

Generators

Encode text into URL-safe percent encoding or decode URL-encoded values back to readable text.

Encoding Tools

Generate secure random passwords with configurable length and character groups.

Generators

Generate placeholder words, sentences, or paragraphs for layouts, mockups, and drafts.

Text Tools