ForHosting KIT

Everything you need.
One Kit.

Hundreds of ready-made tasks — PDF, images, audio, OCR, text AI, scraping, data and more — behind a single REST API. Send a job, get a finished result by webhook. No servers, no per-model tokens, a price you can read.

REST APILive
EmailLive
Webforhosting.com/kitLive
TelegramLive
iOS & AndroidBuilding
WhatsAppComing
7554ready-made tools
6channels
1API & key
$0.002per call, from

New capabilities

Fresh in the kit — just landed.

New⚙️ Developer UtilitiesVolume to density calculatorρ=m/V from mass and volumeAabuela$0.002Open phys.volume_to_densityNew⚙️ Developer UtilitiesVoltage regulation calculator% from no-load and full-load VSsamurai$0.002Open phys.voltage_regulationNew⚙️ Developer UtilitiesVickers hardness number calculatorHV from force and diagonalPPavilion$0.002Open phys.vickers_hardness_numberNew⚙️ Developer UtilitiesVelocity calculatoraverage v = d/t in metres per secondAabuela$0.002Open phys.velocityNew⚙️ Developer UtilitiesValve flow coefficient calculatorCv from GPM, ΔP and GSsamurai$0.002Open phys.valve_flow_coefficientNew⚙️ Developer UtilitiesBarrel twist rate calculatorGreenhill formula, one turn per inchPPavilion$0.002Open phys.twist_rateNew⚙️ Developer UtilitiesTrue strain calculatorε_t = ln(1+ε) from engineering strainAabuela$0.002Open phys.true_strainNew⚙️ Developer UtilitiesTransmission coefficient calculatorpower T from η₁, η₂Ssamurai$0.002Open phys.transmissionNew⚙️ Developer UtilitiesTorsional stiffness calculatorκ = GJ/L in N·m/rad, freePPavilion$0.002Open phys.torsional_stiffnessNew⚙️ Developer UtilitiesTorsional spring calculatorκ = E d⁴ / (64 D N), N·mm/radAabuela$0.002Open phys.torsional_springNew⚙️ Developer UtilitiesToilet paper race mass moment of inertiaI = ½m(ri²+ro²)Ssamurai$0.002Open phys.toilet_paper_race_mass_moment_inertiaNew⚙️ Developer UtilitiesTime dilation calculatordilated time from proper time and velocityPPavilion$0.002Open phys.time_dilation

The full catalog

Search or filter by category. Every capability is its own endpoint with a published price.

⚙️ Developer UtilitiesFree
Absorbance transmittance converter
A, %T, OD and more, free
Ssamurai
POST /conv/absorbance-transmittance$0.002
⚙️ Developer UtilitiesFree
Acoustic impedance converter
Pa·s/m, rayls, cgs rayls, free
Ssamurai
POST /conv/acoustic-impedance$0.002
⚙️ Developer UtilitiesFree
Acres to square feet converter
exact factor, free
Aabuela
POST /conv/acres-to-square-feet$0.002
⚙️ Developer UtilitiesFree
Bar to kPa converter
exact factor, free in browser
Aabuela
POST /conv/bar-to-kpa$0.002
⚙️ Developer UtilitiesFree
Bar to PSI converter
exact bar factor, free online
Ssamurai
POST /conv/bar-to-psi$0.002
⚙️ Developer UtilitiesFree
Barrels to liters converter
exact oil barrel factor, free
Ssamurai
POST /conv/barrels-to-liters$0.002
⚙️ Developer UtilitiesFree
BTU per hour to watts converter
exact IT factor, free
Ssamurai
POST /conv/btu-per-hour-to-watts$0.002
⚙️ Developer UtilitiesFree
BTU to joules converter
exact International Table factor, free
Ssamurai
POST /conv/btu-to-joules$0.002
⚙️ Developer UtilitiesFree
CC to cubic inches converter
exact factor, free
Ssamurai
POST /conv/cc-to-cubic-inches$0.002
⚙️ Developer UtilitiesFree
CFM to cubic meters per hour converter
exact factor, free
Aabuela
POST /conv/cfm-to-cubic-meters-per-hour$0.002
⚙️ Developer UtilitiesFree
CM to feet converter
exact 30.48 factor, free in browser
Ssamurai
POST /conv/cm-to-feet$0.002
⚙️ Developer UtilitiesFree
Cooling capacity converter
tons of refrigeration, kW, BTU/h free
Ssamurai
POST /conv/cooling-capacity$0.002
⚙️ Developer UtilitiesFree
Cubic feet to gallons converter
exact US factor, free
Aabuela
POST /conv/cubic-feet-to-gallons$0.002
⚙️ Developer UtilitiesFree
Cubic inches to cc converter
exact factor, free
Aabuela
POST /conv/cubic-inches-to-cc$0.002
⚙️ Developer UtilitiesFree
Cups to ml converter
exact US factor, free
Ssamurai
POST /conv/cups-to-ml$0.002
⚙️ Developer UtilitiesFree
Current density converter
A/m², A/mm², A/in², free
Ssamurai
POST /conv/current-density$0.002
⚙️ Developer UtilitiesFree
Damping coefficient converter
N·s/m, lbf·s/ft, lbf·s/in, free
Ssamurai
POST /conv/damping-coefficient$0.002
⚙️ Developer UtilitiesFree
Diopter converter
diopters, mm, inches, free
Ssamurai
POST /conv/diopter$0.002
⚙️ Developer UtilitiesFree
DPI / PPI resolution converter
dpcm, dpmm and more, free
Ssamurai
POST /conv/dpi-ppi$0.002
⚙️ Developer UtilitiesFree
Drill bit size converter
number, letter, fraction & mm, free
Ssamurai
POST /conv/drill-bit-size$0.002
⚙️ Developer UtilitiesFree
Earthquake magnitude energy converter
Mw, joules, tons TNT, free
Ssamurai
POST /conv/earthquake-energy$0.002
⚙️ Developer UtilitiesFree
Electric dipole moment converter
debye, C·m, a.u., free
Ssamurai
POST /conv/electric-dipole-moment$0.002
⚙️ Developer UtilitiesFree
Electronvolts to joules converter
exact SI factor, free
Ssamurai
POST /conv/electronvolts-to-joules$0.002
⚙️ Developer UtilitiesFree
Energy density converter
J/m³, Wh/L, BTU/ft³, free
Ssamurai
POST /conv/energy-density$0.002
⚙️ Developer UtilitiesFree
EV efficiency converter
Wh/mi, Wh/km, mi/kWh, kWh/100km, free
Ssamurai
POST /conv/ev-efficiency$0.002
⚙️ Developer UtilitiesFree
Fahrenheit to Kelvin converter
exact (F−32)×5/9+273.15, free
Aabuela
POST /conv/fahrenheit-to-kelvin$0.002
⚙️ Developer UtilitiesFree
Feet to inches converter
convert feet to inches, free
Aabuela
POST /conv/feet-to-inches$0.002
⚙️ Developer UtilitiesFree
Feet to yards converter
exact factor, free in browser
Ssamurai
POST /conv/feet-to-yards$0.002
⚙️ Developer UtilitiesFree
Jansky flux density converter
Jy, mJy, W/m²/Hz, erg units, free
Ssamurai
POST /conv/flux-density-jansky$0.002
⚙️ Developer UtilitiesFree
Fracture toughness converter
MPa√m, ksi√in, Pa√m, free
Ssamurai
POST /conv/fracture-toughness$0.002
⚙️ Developer UtilitiesFree
Gallons to liters converter
exact US factor, free
Ssamurai
POST /conv/gallons-to-liters$0.002
⚙️ Developer UtilitiesFree
Gbps to Mbps converter
exact ×1000 factor, free in browser
Aabuela
POST /conv/gbps-to-mbps$0.002
⚙️ Developer UtilitiesFree
Gemstone carat & point converter
carats, points, grams, grains free
Ssamurai
POST /conv/gem-weight$0.002
⚙️ Developer UtilitiesFree
GPM to LPM converter
exact US factor, free
Ssamurai
POST /conv/gpm-to-lpm$0.002
⚙️ Developer UtilitiesFree
Grams to carats converter
exact metric factor, free
Aabuela
POST /conv/grams-to-carats$0.002
⚙️ Developer UtilitiesFree
Hectares to square km converter
exact factor, free
Aabuela
POST /conv/hectares-to-square-km$0.002
⚙️ Developer UtilitiesFree
Hounsfield unit converter
HU, attenuation & density
Ssamurai
POST /conv/hounsfield$0.002
⚙️ Developer UtilitiesFree
Hz to RPM converter
exact ×60 factor, free
Ssamurai
POST /conv/hz-to-rpm$0.002
⚙️ Developer UtilitiesFree
Inches to feet converter
exact factor, free in browser
Ssamurai
POST /conv/inches-to-feet$0.002
⚙️ Developer UtilitiesFree
Inches to mm converter
convert inches to millimeters, free
Ssamurai
POST /conv/inches-to-mm$0.002
⚙️ Developer UtilitiesFree
inHg to mb converter
exact factor, free in browser
Ssamurai
POST /conv/inhg-to-mb$0.002
⚙️ Developer UtilitiesFree
Joules to kWh converter
exact 3.6e6 factor, free
Aabuela
POST /conv/joules-to-kwh$0.002
⚙️ Developer UtilitiesFree
kcal to kJ converter
exact 4.184 factor, free
Aabuela
POST /conv/kcal-to-kj$0.002
⚙️ Developer UtilitiesFree
Kelvin to Celsius converter
exact K−273.15, free
Ssamurai
POST /conv/kelvin-to-celsius$0.002
⚙️ Developer UtilitiesFree
Kelvin to Fahrenheit converter
exact (K−273.15)×9/5+32, free
Aabuela
POST /conv/kelvin-to-fahrenheit$0.002
⚙️ Developer UtilitiesFree
KG to lbs converter
exact factor, free in browser
Ssamurai
POST /conv/kg-to-lbs$0.002
⚙️ Developer UtilitiesFree
Km/h to mph converter
exact factor, free in browser
Aabuela
POST /conv/kmh-to-mph$0.002
⚙️ Developer UtilitiesFree
Knitting needle size converter
mm, US, UK metric, free
Ssamurai
POST /conv/knitting-needle-size$0.002
⚙️ Developer UtilitiesFree
Knots to meters per second
exact factor, free in browser
Ssamurai
POST /conv/knots-to-meters-per-second$0.002
⚙️ Developer UtilitiesFree
kPa to PSI converter
exact kilopascal factor, free online
Ssamurai
POST /conv/kpa-to-psi$0.002
⚙️ Developer UtilitiesFree
kW to BTU/h converter
exact International Table factor, free
Aabuela
POST /conv/kw-to-btu-per-hour$0.002
⚙️ Developer UtilitiesFree
kWh to joules converter
exact 3.6e6 factor, free
Ssamurai
POST /conv/kwh-to-joules$0.002
⚙️ Developer UtilitiesFree
Lbs to kg converter
exact factor, free online
Aabuela
POST /conv/lbs-to-kg$0.002
⚙️ Developer UtilitiesFree
Lbs to stone converter
exact 14 lb factor, free online
Aabuela
POST /conv/lbs-to-stone$0.002
⚙️ Developer UtilitiesFree
Light-years to km converter
exact factor, free in browser
Aabuela
POST /conv/light-years-to-km$0.002
⚙️ Developer UtilitiesFree
Liters to cubic feet converter
exact factor, free
Ssamurai
POST /conv/liters-to-cubic-feet$0.002
⚙️ Developer UtilitiesFree
Liters to gallons converter
exact US factor, free
Aabuela
POST /conv/liters-to-gallons$0.002
⚙️ Developer UtilitiesFree
Mach to mph converter
exact ISA factor, free in browser
Aabuela
POST /conv/mach-to-mph$0.002
⚙️ Developer UtilitiesFree
Mass attenuation coefficient converter
cm²/g, m²/kg, free
Ssamurai
POST /conv/mass-attenuation$0.002
⚙️ Developer UtilitiesFree
Mbps to Gbps converter
exact ÷1000 factor, free
Ssamurai
POST /conv/mbps-to-gbps$0.002

How it works

1

Get your key

Create an account with your email and add balance when you need it. No subscription, no sales call.

2

Call the endpoint

One authenticated POST. The API returns a task_id immediately — copy-paste snippets in five languages on every page.

3

Collect the result

Receive a signed webhook the moment it's ready, or fetch a signed link. A failed task is never charged.

Pay only for what you use

No subscription. Free tools run in your browser; paid tasks draw from your balance, which never expires.

Free tools
$0.00

On-device utilities — hash, QR, JSON, Text→PDF and more — run in your browser. No account, no limits.

Balance
$10.00+

Top up your balance and spend it across web, API and the app. It never expires.