Developer Utilities
Small developer utilities that save a trip to a random website. Encode and decode Base64, explain a regex, build UTM links, generate QR codes and vCards, and more — the everyday helpers. Free in your browser, and available by API when you need them in a script.
Developer Utilities
Linear mass density converter
kg/m, g/m, lb/ft and more, free
POST /conv/linear-density$0.002Developer Utilities
Linear energy transfer converter
keV/μm, MeV/cm, J/m, free
POST /conv/linear-energy-transfer$0.002Developer Utilities
Nominal lumber size converter
actual inches & mm, free
POST /conv/lumber-size$0.002Developer Utilities
Luminous energy converter
lm·s, talbot, lm·h, free
POST /conv/luminous-energy$0.002Developer Utilities
Luminous exposure converter
lux·s, lux·h, phot·s, free
POST /conv/luminous-exposure$0.002Developer Utilities
Magnetic moment converter
A·m², μB, erg/G, J/T, free
POST /conv/magnetic-moment$0.002Developer Utilities
Magnetic susceptibility converter
SI/CGS volume, mass & molar, free
POST /conv/magnetic-susceptibility$0.002Developer Utilities
Magnetomotive force converter
ampere-turns, gilberts, abampere-turns, free
POST /conv/magnetomotive-force$0.002Developer Utilities
Mass diffusivity converter
m²/s, cm²/s, ft²/h, free
POST /conv/mass-diffusivity$0.002Developer Utilities
Mass flux converter
kg/(m²·s), g/(cm²·s) and more, free
POST /conv/mass-flux$0.002Developer Utilities
Meters per second to mph
exact factor, free in browser
POST /conv/meters-per-second-to-mph$0.002Developer Utilities
Meters to inches converter
exact factor, free in browser
POST /conv/meters-to-inches$0.002Developer Utilities
Meters to yards converter
exact factor, free in browser
POST /conv/meters-to-yards$0.002Developer Utilities
Metric tons to US tons converter
exact factor, free in browser
POST /conv/metric-tons-to-us-tons$0.002Developer Utilities
Miles to yards converter
exact factor, free in browser
POST /conv/miles-to-yards$0.002Developer Utilities
ML to teaspoons converter
exact 5 ml factor, free
POST /conv/ml-to-teaspoons$0.002Developer Utilities
Molar conductivity converter
S·m²/mol, S·cm²/mol, free
POST /conv/molar-conductivity$0.002Developer Utilities
Molar entropy converter
J/(mol·K), cal/(mol·K), eu, free
POST /conv/molar-entropy$0.002Developer Utilities
Molar flow rate converter
mol/s, mol/h, kmol/h, free
POST /conv/molar-flow-rate$0.002Developer Utilities
Molar volume converter
m³/mol, L/mol, mL/mol and more, free
POST /conv/molar-volume$0.002Developer Utilities
Nuclear cross section converter
barn, m², cm², free
POST /conv/nuclear-cross-section$0.002Developer Utilities
Numerical aperture converter
NA, f-number and acceptance angle, free
POST /conv/numerical-aperture$0.002Developer Utilities
Parsecs to light-years converter
exact IAU factor, free
POST /conv/parsecs-to-light-years$0.002Developer Utilities
Permeability converter
darcy, millidarcy, m² and more, free
POST /conv/permeability-darcy$0.002Developer Utilities
Permittivity converter
F/m, ε_r, pF/m, free
POST /conv/permittivity$0.002Developer Utilities
Photon energy converter
eV, nm wavelength, THz, free
POST /conv/photon-energy$0.002Developer Utilities
Pressure unit converter
Pa, kPa, bar, atm, psi, mmHg and torr, free
POST /conv/pressure$0.002Developer Utilities
Pressure altitude converter
hPa, inHg, meters and more, free
POST /conv/pressure-altitude$0.002Developer Utilities
Pressure head converter
mH2O, ftH2O, psi and more, free
POST /conv/pressure-head$0.002Developer Utilities
Rainfall rate converter
mm/h, in/h, L/m²/h, free
POST /conv/rainfall-rate$0.002Developer Utilities
Audio sample rate converter
Hz, kHz, sps, free
POST /conv/sample-rate$0.002Developer Utilities
Screw gauge size converter
US #, mm & inch diameter, free
POST /conv/screw-size$0.002Developer Utilities
Section modulus converter
m³, cm³, mm³, in³, free
POST /conv/section-modulus$0.002Developer Utilities
Sheet metal gauge converter
gauge, mm, inches, free
POST /conv/sheet-metal-gauge$0.002Developer Utilities
Shutter speed converter
fraction, seconds, stops, free
POST /conv/shutter-speed$0.002Developer Utilities
Sieve mesh size converter
US, Tyler, micron, free
POST /conv/sieve-mesh$0.002Developer Utilities
Solar mass, radius & luminosity converter
SI units, free
POST /conv/solar-units$0.002Developer Utilities
Sound absorption converter
sabins ↔ metric sabins ↔ m², free
POST /conv/sound-absorption$0.002Developer Utilities
Sound power converter
W, dB re 1 pW, BTU/h, free
POST /conv/sound-power$0.002Developer Utilities
Specific impulse converter
seconds, m/s exhaust velocity, lbf·s/lb, free
POST /conv/specific-impulse$0.002Developer Utilities
Square km to square miles
exact factor, free in browser
POST /conv/square-km-to-square-miles$0.002Developer Utilities
Spring stiffness converter
N/m, lbf/in, kg/mm, free
POST /conv/stiffness$0.002Developer Utilities
Guitar string gauge converter
mils, mm & inches, free
POST /conv/string-gauge$0.002Developer Utilities
Surface charge density converter
C/m², C/cm², C/in², free
POST /conv/surface-charge-density$0.002Developer Utilities
Thermal conductance converter
W/K, BTU/(h·°F), cal/(s·K), free
POST /conv/thermal-conductance$0.002Developer Utilities
Thermal expansion coefficient converter
1/K, ppm/K, 1/°F, free
POST /conv/thermal-expansion-coefficient$0.002Developer Utilities
Thread count converter
TPI, threads/cm, per 10 cm and more, free
POST /conv/thread-count$0.002Developer Utilities
Thread pitch converter
TPI, mm pitch and threads/cm, free
POST /conv/thread-pitch$0.002Developer Utilities
Torr to PSI converter
exact torr factor, free
POST /conv/torr-to-psi$0.002Developer Utilities
Turbidity converter
NTU, FNU, FTU, JTU, free
POST /conv/turbidity$0.002Developer Utilities
Vacuum pressure converter
torr, mbar, Pa, micron, free
POST /conv/vacuum$0.002Developer Utilities
Water conductivity & TDS converter
µS/cm, ppm, gpg, free
POST /conv/water-conductivity$0.002Developer Utilities
Cups to grams converter
flour, sugar, butter and more by ingredient density, free
POST /cook/cups-grams$0.002Developer Utilities
Fluid ounces to ml converter
US and imperial fl oz ↔ milliliters, free
POST /cook/fl-oz-ml$0.002Developer Utilities
Flour cups to grams converter
all-purpose, bread & cake, free
POST /cook/flour$0.002Developer Utilities
Gas mark converter
oven °C & °F from Gas Mark, free
POST /cook/gas-mark$0.002Developer Utilities
Grams to cups converter
by ingredient density, free
POST /cook/grams-cups$0.002Developer Utilities
mL to cups converter
US, metric & imperial cups, free
POST /cook/ml-cups$0.002Developer Utilities
Oven temperature converter
Celsius, Fahrenheit and oven heat labels, free
POST /cook/oven-temp$0.002Developer Utilities
Cooking ounces to grams converter
kitchen weight oz ↔ g, free
POST /cook/oz-grams$0.002