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
Megabits to megabytes converter
exact ÷8 factor, free
Ssamurai
POST /conv/megabits-to-megabytes$0.002
⚙️ Developer UtilitiesFree
Megapixel resolution converter
MP, pixels, width×height, free
Ssamurai
POST /conv/megapixels$0.002
⚙️ Developer UtilitiesFree
Meters per second to km/h
exact ×3.6 factor, free in browser
Aabuela
POST /conv/meters-per-second-to-kmh$0.002
⚙️ Developer UtilitiesFree
Meters to feet converter
exact factor, free in browser
Ssamurai
POST /conv/meters-to-feet$0.002
⚙️ Developer UtilitiesFree
Metric HP to kW converter
PS/CV to kilowatts, exact factor
Ssamurai
POST /conv/metric-hp-to-kw$0.002
⚙️ Developer UtilitiesFree
Metric tons to kg converter
exact factor, free in browser
Ssamurai
POST /conv/metric-tons-to-kg$0.002
⚙️ Developer UtilitiesFree
Color temperature mired converter
Kelvin, mired, MK⁻¹
Ssamurai
POST /conv/mired$0.002
⚙️ Developer UtilitiesFree
mmHg to atm converter
exact factor, free in browser
Ssamurai
POST /conv/mmhg-to-atm$0.002
⚙️ Developer UtilitiesFree
Molality converter
mol/kg, mmol/kg, molal and more free
Ssamurai
POST /conv/molality$0.002
⚙️ Developer UtilitiesFree
Molar enthalpy converter
J/mol, kcal/mol, BTU/lbmol, free
Ssamurai
POST /conv/molar-enthalpy$0.002
⚙️ Developer UtilitiesFree
MPG to km/L converter
exact US factor, free in browser
Aabuela
POST /conv/mpg-to-kml$0.002
⚙️ Developer UtilitiesFree
Mph to km/h converter
exact 1.609344 factor, free in browser
Ssamurai
POST /conv/mph-to-kmh$0.002
⚙️ Developer UtilitiesFree
Mph to knots converter
exact factor, free in browser
Ssamurai
POST /conv/mph-to-knots$0.002
⚙️ Developer UtilitiesFree
Mph to meters per second
exact factor, free in browser
Ssamurai
POST /conv/mph-to-meters-per-second$0.002
⚙️ Developer UtilitiesFree
Nautical miles to miles converter
exact factor, free in browser
Ssamurai
POST /conv/nautical-miles-to-miles$0.002
⚙️ Developer UtilitiesFree
Newton-meters to foot-pounds converter
exact factor, free
Ssamurai
POST /conv/newton-meters-to-foot-pounds$0.002
⚙️ Developer UtilitiesFree
Newtons to pounds-force converter
exact factor, free
Ssamurai
POST /conv/newtons-to-pounds-force$0.002
⚙️ Developer UtilitiesFree
Number density converter
per m³, per cm³, per L, free
Ssamurai
POST /conv/number-density$0.002
⚙️ Developer UtilitiesFree
Octave band frequency converter
Hz, octaves, decades
Ssamurai
POST /conv/octave-band$0.002
⚙️ Developer UtilitiesFree
Osmolarity converter
Osm/L, mOsm/L, µOsm/L free instant
Ssamurai
POST /conv/osmolarity$0.002
⚙️ Developer UtilitiesFree
Ounces to cups converter
exact US fluid factor, free
Aabuela
POST /conv/ounces-to-cups$0.002
⚙️ Developer UtilitiesFree
Ounces to grams converter
exact factor, free in browser
Ssamurai
POST /conv/ounces-to-grams$0.002
⚙️ Developer UtilitiesFree
Ounces to lbs converter
exact 16 oz factor, free
Aabuela
POST /conv/ounces-to-lbs$0.002
⚙️ Developer UtilitiesFree
Particle fluence converter
per m², per cm², per barn, free
Ssamurai
POST /conv/particle-fluence$0.002
⚙️ Developer UtilitiesFree
Nominal pipe size converter
NPS, DN & OD mm free
Ssamurai
POST /conv/pipe-size$0.002
⚙️ Developer UtilitiesFree
Plato & specific gravity converter
°P, SG, Brix, free
Ssamurai
POST /conv/plato-gravity$0.002
⚙️ Developer UtilitiesFree
Pounds-force to newtons converter
exact factor, free in browser
Aabuela
POST /conv/pounds-force-to-newtons$0.002
⚙️ Developer UtilitiesFree
Pounds to grams converter
exact factor, free in browser
Ssamurai
POST /conv/pounds-to-grams$0.002
⚙️ Developer UtilitiesFree
PSI to ATM converter
exact atmosphere factor, free
Aabuela
POST /conv/psi-to-atm$0.002
⚙️ Developer UtilitiesFree
PSI to kPa converter
exact factor, free in browser
Aabuela
POST /conv/psi-to-kpa$0.002
⚙️ Developer UtilitiesFree
Quarts to cups converter
exact US factor, free
Aabuela
POST /conv/quarts-to-cups$0.002
⚙️ Developer UtilitiesFree
Radiant intensity converter
W/sr, mW/sr, W/deg², free
Ssamurai
POST /conv/radiant-intensity$0.002
⚙️ Developer UtilitiesFree
Reactive power converter
var, kvar, Mvar free
Ssamurai
POST /conv/reactive-power$0.002
⚙️ Developer UtilitiesFree
Magnetic reluctance converter
H⁻¹, At/Wb, rel, free
Ssamurai
POST /conv/reluctance$0.002
⚙️ Developer UtilitiesFree
RPM to Hz converter
revolutions per minute to hertz free
Aabuela
POST /conv/rpm-to-hz$0.002
⚙️ Developer UtilitiesFree
Shore hardness converter
Shore A, D, OO free
Ssamurai
POST /conv/shore-hardness$0.002
⚙️ Developer UtilitiesFree
Square meters to square feet
exact factor, free in browser
Ssamurai
POST /conv/square-meters-to-square-feet$0.002
⚙️ Developer UtilitiesFree
Square miles to acres converter
exact factor, free
Ssamurai
POST /conv/square-miles-to-acres$0.002
⚙️ Developer UtilitiesFree
Surface density converter
kg/m², g/cm², oz/yd² and more, free
Ssamurai
POST /conv/surface-density$0.002
⚙️ Developer UtilitiesFree
Tablespoons to cups converter
exact US factor, free
Aabuela
POST /conv/tablespoons-to-cups$0.002
⚙️ Developer UtilitiesFree
Teaspoons to tablespoons converter
exact 3 tsp = 1 tbsp, free
Ssamurai
POST /conv/teaspoons-to-tablespoons$0.002
⚙️ Developer UtilitiesFree
Thermal diffusivity converter
m²/s, cm²/s, ft²/h, free
Ssamurai
POST /conv/thermal-diffusivity$0.002
⚙️ Developer UtilitiesFree
Temperature gradient converter
K/m, °F/ft, °C/cm and more
Ssamurai
POST /conv/thermal-gradient$0.002
⚙️ Developer UtilitiesFree
Therms to kWh converter
exact factor, free in browser
Ssamurai
POST /conv/therms-to-kwh$0.002
⚙️ Developer UtilitiesFree
Troy ounces to grams converter
exact factor, free in browser
Ssamurai
POST /conv/troy-ounces-to-grams$0.002
⚙️ Developer UtilitiesFree
Twip converter
twips, points, pixels and inches, free
Ssamurai
POST /conv/twip$0.002
⚙️ Developer UtilitiesFree
Valve flow coefficient converter
Cv, Kv, Av, free
Ssamurai
POST /conv/valve-flow-coefficient$0.002
⚙️ Developer UtilitiesFree
Volume charge density converter
C/m³, C/L, C/cm³, free
Ssamurai
POST /conv/volume-charge-density$0.002
⚙️ Developer UtilitiesFree
VSWR return loss converter
SWR, |Γ|, RL dB and mismatch loss
Ssamurai
POST /conv/vswr$0.002
⚙️ Developer UtilitiesFree
Watt-hours to joules converter
exact 3600 factor, free
Aabuela
POST /conv/watt-hours-to-joules$0.002
⚙️ Developer UtilitiesFree
Watts to horsepower converter
exact mechanical factor, free
Aabuela
POST /conv/watts-to-horsepower$0.002
⚙️ Developer UtilitiesFree
Yards to feet converter
exact factor, free in browser
Aabuela
POST /conv/yards-to-feet$0.002
⚙️ Developer UtilitiesFree
Aadhaar Verhoeff check digit
compute or validate 12-digit UID free
PPavilion
POST /enc/aadhaar-india$0.002
⚙️ Developer UtilitiesFree
ABA routing check digit
compute from 8 digits or validate a 9-digit RTN
Aabuela
POST /enc/aba-routing$0.002
⚙️ Developer UtilitiesFree
Able Baker alphabet
spell or decode Joint Army/Navy code words, free
Ssamurai
POST /enc/able-baker$0.002
⚙️ Developer UtilitiesFree
Australian Business Number (ABN) check
modulo-89 validator
Aabuela
POST /enc/abn-australia$0.002
⚙️ Developer UtilitiesFree
Australian ACN check digit
compute and validate free online
PPavilion
POST /enc/acn-australia$0.002
⚙️ Developer UtilitiesFree
ADFGVX cipher
encrypt & decrypt with square and transposition keys, free
Aabuela
POST /enc/adfgvx$0.002
⚙️ Developer UtilitiesFree
ADFGX cipher
encrypt or decrypt with Polybius and transposition, free
Ssamurai
POST /enc/adfgx$0.002
⚙️ Developer UtilitiesFree
Adler-32 checksum calculator
zlib-style hex 32-bit
Ssamurai
POST /enc/adler32$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.