Simple online tools: calculators, converters and developer utilities
Available Tools
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Percentage Calculator
Calculate percentages, percentage increases, and percentage decreases quickly and accurately.
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Rule of Three Calculator
Calculate unknown values in proportions using the rule of three (cross multiplication).
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Average Calculator
Calculate the average (arithmetic mean) of any set of numbers instantly. Perfect for grades, scores, measurements, and more.
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Fraction to Decimal Converter
Convert any fraction to its decimal equivalent quickly and accurately. Perfect for math homework, engineering calculations, and everyday conversions.
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Percentage Change Calculator
Calculate the percentage change between two values to see how much something has increased or decreased.
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Temperature Converter
Convert temperatures between Celsius and Fahrenheit quickly and accurately. Perfect for cooking, weather, and scientific calculations.
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Distance Converter
Convert distances between kilometers (km) and miles (mi) quickly and accurately. Perfect for travel planning and navigation.
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Weight Converter
Convert weights between kilograms (kg) and pounds (lb) quickly and accurately. Perfect for cooking, fitness, and shipping calculations.
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Bytes Converter
Convert digital storage units between bytes, KB, MB, and GB quickly and accurately. Perfect for file sizes, storage capacity, and data transfer calculations.
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Time Unit Converter
Convert time units between seconds, minutes, and hours quickly and accurately. Perfect for time calculations, duration measurements, and scheduling.
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JSON Formatter & Minifier
Format JSON with proper indentation for readability or minify it to reduce file size. All processing runs locally in your browser for privacy and security.
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URL Encode & Decode
Encode special characters in URLs for safe transmission or decode encoded URLs to read the original text. All encoding and decoding runs locally in your browser.
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Base64 Encode & Decode
Encode text or binary data to Base64 format or decode Base64 strings back to original text. Full UTF-8 Unicode support ensures proper handling of international characters. All processing runs locally in your browser.
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UUID v4 Generator
Generate cryptographically secure UUID v4 identifiers for use in databases, APIs, and applications. Generate single UUIDs or multiple UUIDs at once. All generation happens locally in your browser.
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Unix Timestamp Converter
Convert Unix timestamps (seconds or milliseconds since January 1, 1970) to readable dates and times, or convert dates to Unix timestamps. All conversions show both UTC and local time. Processing runs locally in your browser.
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Text Counter
Get accurate word count, character count, and other text statistics for your content.