Free online converters and file tools
No sign-up. Runs in your browser.Length
Meters, feet, inches, miles
Image converter
JPG, PNG, WebP
Weight and mass
Kilograms, pounds, ounces, stones
Temperature
Celsius, Fahrenheit, Kelvin
Area
Square meters, acres, hectares, square feet
Volume
Liters, gallons, cups, cubic meters
Speed
km/h, mph, m/s, knots
Time
Seconds, minutes, hours, days, years
Data storage
Bytes, KB, MB, GB, TB, GiB
Data transfer rate
Mbit/s, MB/s, Gbit/s
Energy
Joules, kWh, calories, BTU
Power
Watts, kilowatts, horsepower, BTU/h
Pressure
Pascal, bar, psi, atm
Force
Newtons, pounds-force, kilograms-force
Frequency
Hertz, kHz, MHz, GHz, rpm
Angle
Degrees, radians, gradians
Fuel consumption
MPG, L/100km, km/L
Density
kg/m³, g/cm³, lb/ft³
Acceleration
m/s², g-force, ft/s²
Torque
N·m, lbf·ft, kgf·m
Voltage
Volts, millivolts, kilovolts
Electric current
Amperes, milliamperes, microamperes
Electrical resistance
Ohms, kilohms, megohms
Capacitance
Farads, microfarads, nanofarads, picofarads
Inductance
Henries, millihenries, microhenries
Electric charge
Coulombs, mAh, Ah
Electrical conductance
Siemens, millisiemens, mho
Electric field strength
Volts per meter, kV/m, V/cm
Electrical resistivity
Ohm-meters, ohm-centimeters
Electrical conductivity
S/m, mS/cm, µS/cm
Magnetic flux density
Tesla, gauss, millitesla
Magnetic flux
Weber, maxwell, volt-second
Magnetic field strength
Amperes per meter, oersted
Illuminance
Lux, foot-candles, phot
Luminance
cd/m², nit, foot-lambert
Radioactivity
Becquerel, curie, dpm
Radiation absorbed dose
Gray, rad, milligray
Radiation dose equivalent
Sievert, rem, millisievert
Radiation exposure
Coulomb per kg, roentgen
Volume flow rate
L/min, m³/h, gal/min, cfm
Mass flow rate
kg/s, kg/h, lb/h, t/h
Dynamic viscosity
Pa·s, centipoise, poise
Kinematic viscosity
m²/s, centistokes, stokes
Thermal conductivity
W/(m·K), BTU/(h·ft·°F)
Specific heat capacity
J/(kg·K), kJ/(kg·K), cal/(g·°C)
Surface tension
N/m, mN/m, dyn/cm
Heat flux density
W/m², BTU/(h·ft²)
Molar concentration
mol/L, mmol/L, mol/m³
Typography
Pixels, points, picas, em, rem
Digital image resolution
DPI, PPI, pixels per cm
SI prefixes
Kilo, mega, giga, milli, micro, nano
Moment of inertia
kg·m², lb·ft², g·cm²
Specific volume
m³/kg, L/kg, ft³/lb
Cooking measurements
Cups, tablespoons, teaspoons, mL
Running pace and speed
min/km, min/mi, km/h, mph
Angular velocity
rad/s, rpm, degrees per second
Angular acceleration
rad/s², °/s², rpm/s
Heat capacity
J/K, kJ/K, cal/°C, BTU/°F
Thermal diffusivity
m²/s, mm²/s, ft²/h
Heat transfer coefficient
W/(m²·K), BTU/(h·ft²·°F)
Thermal resistance
K/W, °C/W, °F·h/BTU
Thermal expansion
1/K, ppm/K, 1/°F
Heat density
J/m³, kWh/m³, BTU/ft³
Power density
W/m³, W/L, kW/m³
Linear mass density
kg/m, tex, denier, lb/ft
Area density
kg/m², g/m² (gsm), oz/yd²
Magnetomotive force
Ampere-turns, gilbert
Magnetic permeability
H/m, µH/m, N/A²
Linear charge density
C/m, µC/m, nC/m
Surface charge density
C/m², µC/cm², C/ft²
Linear current density
A/m, A/cm, A/in
Molar flow rate
mol/s, mol/min, kmol/h
Mass flux density
kg/(s·m²), g/(s·cm²), lb/(h·ft²)
Mass concentration
mg/L, ppm, g/L, mg/dL
Radiation dose rate
µSv/h, mSv/h, mrem/h
Luminous intensity
Candela, millicandela, lm/sr
Luminous flux
Lumens, millilumens, kilolumens
Compress image
Smaller files, same look
Resize and crop
Change size, crop, rotate
Audio trimmer
Cut the part you need
Video compressor
Shrink large videos
Merge and split PDF
Combine or separate pages
Send files
Device to device, no size limit
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Simple tools that work in your browser
Utilio is a growing collection of free tools for everyday jobs. It has 76 unit converters, from the length converter and weight converter to temperature, volume, speed, data storage, pressure, energy and electrical units, plus an image converter for JPG, PNG and WebP.
Your files stay on your device
Every tool runs inside your browser. Images and other files are never uploaded to a server, there is nothing to install and you do not need an account. Once a page has loaded, the tools keep working even without an internet connection.
More tools are on the way, including image compression, PDF tools and audio and video tools.