Free Online Converters
8 free tools — convert between units, formats, and number systems instantly
Convert between units, colors, timestamps, timezones, file sizes, cooking measurements, number bases, and Roman numerals — all instantly in your browser. itoolz converters cover the most common conversion needs for everyday life, development, cooking, and science. Enter a value in one format and see all conversions update in real time. Whether you're converting kilometers to miles, HEX colors to RGB, Unix timestamps to readable dates, or cups to milliliters, every conversion is precise and instant.
All Converters (8)
Unit Converter
Convert between length, weight, volume, temperature, speed, and area units with metric and imperial support
PopularColor Converter
Convert colors seamlessly between HEX, RGB, HSL, and CMYK formats with live color preview
PopularTimestamp Converter
Convert Unix timestamps to human-readable dates and back, with millisecond precision and timezone support
Timezone Converter
Convert times between any of the world's time zones with daylight saving time awareness
File Size Converter
Convert between bytes, kilobytes, megabytes, gigabytes, and terabytes with binary and decimal modes
Cooking Converter
Convert between cups, tablespoons, teaspoons, grams, ounces, and other kitchen measurements accurately
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal systems with real-time conversion
Roman Numeral Converter
Convert between Roman numerals and decimal numbers with validation and historical reference
Why Use itoolz for Converters?
Real-time conversion as you type
Both metric and imperial units supported
Precise calculations based on international standards
8 specialized converters covering everyday needs
Works offline once the page is loaded
No rounding errors — full precision output