Free Online Converters
Convert units, data formats, and files instantly. Length, weight, temperature, CSV, JSON, XML and more.
Length Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, and nautical miles.
Try now βWeight Converter
Convert between milligrams, grams, kilograms, tonnes, ounces, pounds, and stones.
Try now βTemperature Converter
Convert between Celsius, Fahrenheit, and Kelvin temperature scales instantly.
Try now βData Size Converter
Convert between bytes, KB, MB, GB, TB, PB, and bits. Supports both binary (1024) units.
Try now βArea Converter
Convert between square meters, hectares, acres, square feet, square miles, and more area units.
Try now βVolume Converter
Convert between milliliters, liters, gallons, cups, tablespoons, teaspoons, and more volume units.
Try now βSpeed Converter
Convert between km/h, mph, m/s, knots, feet/s, and Mach speed units.
Try now βTime Converter
Convert between milliseconds, seconds, minutes, hours, days, weeks, months, and years.
Try now βFuel Economy Converter
Convert between km/L, MPG (US), MPG (Imperial), and L/100km fuel efficiency units.
Try now βShoe Size Converter
Convert shoe sizes between US Men, US Women, UK, EU, and cm (foot length) systems.
Try now βPressure Converter
Convert between Pascal, kPa, bar, atm, PSI, mmHg, and Torr pressure units.
Try now βEnergy Converter
Convert between Joules, kJ, calories, kcal, Wh, kWh, BTU, and electron volts.
Try now βNumber Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal bases.
Try now βRoman Numeral Converter
Convert between Arabic numbers and Roman numerals (I, V, X, L, C, D, M). Supports 1-3999.
Try now βPower Converter
Convert between Watts, kilowatts, megawatts, horsepower, PS, BTU/h, and foot-pounds/s.
Try now βCurrency Converter
Convert between 30+ world currencies with live exchange rates. Supports USD, EUR, GBP, JPY, and many more.
Try now βWhy Use Tuttilo Converters?
- Convert between dozens of units and formats instantly.
- No file uploads needed for unit conversions β everything runs locally.
- Supports both everyday units and technical data formats.
Frequently Asked Questions
What types of conversions are available?+
We offer unit converters (length, weight, temperature, etc.) and data format converters (CSV to JSON, XML to JSON, YAML, etc.).
Are data format conversions secure?+
Yes. All conversions happen in your browser. Your data is never sent to any server.
Can I convert large files?+
Yes. Since processing is client-side, there are no server limits. Performance depends on your device.