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
Add months to a date
shift calendar date with month-end clamp, free
Ssamurai
POST /date/add-months$0.002
⚙️ Developer UtilitiesFree
Birthstone by birth month
traditional and modern stones, free
Ssamurai
POST /date/birthstone$0.002
⚙️ Developer UtilitiesFree
Chinese zodiac sign calculator
animal by year and lunar New Year, free
Ssamurai
POST /date/chinese-zodiac$0.002
⚙️ Developer UtilitiesFree
Days between two dates
whole calendar day count, free
Ssamurai
POST /date/days-between$0.002
⚙️ Developer UtilitiesFree
Days elapsed in the year
days since January 1, free
Ssamurai
POST /date/days-elapsed-year$0.002
⚙️ Developer UtilitiesFree
Easter Sunday date calculator
Gregorian computus by year, free
Ssamurai
POST /date/easter-sunday$0.002
⚙️ Developer UtilitiesFree
Julian Day to date converter
Gregorian calendar from JDN, free
Ssamurai
POST /date/from-julian-day$0.002
⚙️ Developer UtilitiesFree
Golden number and epact calculator
ecclesiastical year numbers, free
Ssamurai
POST /date/golden-number$0.002
⚙️ Developer UtilitiesFree
ISO week number calculator
week and week-year from any date, free
Ssamurai
POST /date/iso-week-number$0.002
⚙️ Developer UtilitiesFree
ISO week to date converter
calendar date from week year, free
Ssamurai
POST /date/iso-week-to-date$0.002
⚙️ Developer UtilitiesFree
First and last day of month
calendar start and end dates, free
Ssamurai
POST /date/month-start-end$0.002
⚙️ Developer UtilitiesFree
Next leap year finder
next Gregorian leap year on or after a year, free
Ssamurai
POST /date/next-leap-year$0.002
⚙️ Developer UtilitiesFree
Next occurrence of a weekday
next Monday/Friday date from any day, free
Ssamurai
POST /date/next-weekday$0.002
⚙️ Developer UtilitiesFree
Subtract days from a date
earlier calendar date calculator, free
Ssamurai
POST /date/subtract-days$0.002
⚙️ Developer UtilitiesFree
Antenna length calculator
quarter-wave and half-wave from frequency, free
Ssamurai
POST /elec/antenna-length$0.002
⚙️ Developer UtilitiesFree
Battery runtime calculator
hours from Wh and load watts, free
Ssamurai
POST /elec/battery-runtime-wh$0.002
⚙️ Developer UtilitiesFree
Capacitor energy calculator
E = ½CV² in joules, free
Ssamurai
POST /elec/capacitor-energy$0.002
⚙️ Developer UtilitiesFree
Speaker crossover calculator
frequency from L and C, free
Ssamurai
POST /elec/crossover-frequency$0.002
⚙️ Developer UtilitiesFree
dBm to dBW calculator
convert dBm to dBW, free
Ssamurai
POST /elec/dbm-to-dbw$0.002
⚙️ Developer UtilitiesFree
dBm to watts calculator
convert dBm to W and mW, free
Ssamurai
POST /elec/dbm-to-watts$0.002
⚙️ Developer UtilitiesFree
Electric potential calculator
V=kQ/r for a point charge, free
Ssamurai
POST /elec/electric-potential$0.002
⚙️ Developer UtilitiesFree
EMF terminal voltage calculator
V = ε − Ir free
Ssamurai
POST /elec/emf-internal-resistance$0.002
⚙️ Developer UtilitiesFree
Inductor energy calculator
E = ½LI² in joules, free
Ssamurai
POST /elec/inductor-energy$0.002
⚙️ Developer UtilitiesFree
kWh calculator
energy from watts and running time, free
Ssamurai
POST /elec/kwh-calculator$0.002
⚙️ Developer UtilitiesFree
Inverting amplifier calculator
op-amp gain Av = −Rf/Rin, free
Ssamurai
POST /elec/op-amp-inverting$0.002
⚙️ Developer UtilitiesFree
Electrical power calculator
P=VI and P=I²R from any two values, free
Ssamurai
POST /elec/power-vi$0.002
⚙️ Developer UtilitiesFree
Parallel resistance calculator
equivalent Req from R1∥R2∥…, free
Ssamurai
POST /elec/resistors-parallel$0.002
⚙️ Developer UtilitiesFree
RLC resonant frequency calculator
f₀ and Q from L, C, R, free
Ssamurai
POST /elec/rlc-resonance$0.002
⚙️ Developer UtilitiesFree
Smoothing capacitor calculator
C = I/(2f·Vr) filter size, free
Ssamurai
POST /elec/smoothing-capacitor$0.002
⚙️ Developer UtilitiesFree
Solenoid magnetic field calculator
B = μ₀ n I, free
Ssamurai
POST /elec/solenoid-field$0.002
⚙️ Developer UtilitiesFree
Baconian cipher encoder and decoder
five-letter A/B codes, free
Ssamurai
POST /enc/bacon$0.002
⚙️ Developer UtilitiesFree
Base45 encoder and decoder
RFC 9285 for QR credentials, free
Ssamurai
POST /enc/base45$0.002
⚙️ Developer UtilitiesFree
Base64url encoder and decoder
URL-safe, no padding, free
Ssamurai
POST /enc/base64url$0.002
⚙️ Developer UtilitiesFree
Columnar transposition cipher
encrypt decrypt with keyword, free
Ssamurai
POST /enc/columnar$0.002
⚙️ Developer UtilitiesFree
Text to ASCII codes converter
decimal char codes, free
Ssamurai
POST /enc/decimal-ascii$0.002
⚙️ Developer UtilitiesFree
Four-square cipher encoder and decoder
two keywords, free
Ssamurai
POST /enc/four-square$0.002
⚙️ Developer UtilitiesFree
HTML entities encoder and decoder
named and numeric, free
Ssamurai
POST /enc/html-entities$0.002
⚙️ Developer UtilitiesFree
Morse code translator
encode and decode text free
Ssamurai
POST /enc/morse$0.002
⚙️ Developer UtilitiesFree
Quoted-printable encoder and decoder
MIME QP encode/decode, free
Ssamurai
POST /enc/quoted-printable$0.002
⚙️ Developer UtilitiesFree
ROT47 encoder and decoder
printable ASCII cipher, free
Ssamurai
POST /enc/rot47$0.002
⚙️ Developer UtilitiesFree
Flag semaphore translator
encode and decode arm positions free
Ssamurai
POST /enc/semaphore$0.002
⚙️ Developer UtilitiesFree
Trithemius cipher encoder and decoder
progressive shift, free
Ssamurai
POST /enc/trithemius$0.002
⚙️ Developer UtilitiesFree
Vigenère cipher encoder and decoder
keyword polyalphabetic, free
Ssamurai
POST /enc/vigenere$0.002
⚙️ Developer UtilitiesFree
Base36 encoder
convert integer to or from base-36 (0-9 A-Z), free
Ssamurai
POST /fmt/base36$0.002
⚙️ Developer UtilitiesFree
BCD converter
decimal ↔ 8421 binary-coded decimal, free
Ssamurai
POST /fmt/bcd$0.002
⚙️ Developer UtilitiesFree
Binary to decimal converter
base-2 to base-10, free
Ssamurai
POST /fmt/binary-decimal$0.002
⚙️ Developer UtilitiesFree
Decimal to hex converter
base-10 integer to base-16, free
Ssamurai
POST /fmt/decimal-hex$0.002
⚙️ Developer UtilitiesFree
Engineering notation converter
SI prefixes, free
Ssamurai
POST /fmt/engineering-notation$0.002
⚙️ Developer UtilitiesFree
Greek numeral converter
Ionic numerals with keraia, free
Ssamurai
POST /fmt/greek-numerals$0.002
⚙️ Developer UtilitiesFree
Percent to fraction converter
reduced fraction from %, free
Ssamurai
POST /fmt/percent-fraction$0.002
⚙️ Developer UtilitiesFree
Roman fraction converter
uncia notation from twelfths, free
Ssamurai
POST /fmt/roman-fraction$0.002
⚙️ Developer UtilitiesFree
Significant figures rounder
round to N sig figs, free
Ssamurai
POST /fmt/sig-figs$0.002
⚙️ Developer UtilitiesFree
Along-track distance calculator
great-circle projection, free
Ssamurai
POST /geo/along-track-distance$0.002
⚙️ Developer UtilitiesFree
Compass direction to bearing
32-point name to degrees, free
Ssamurai
POST /geo/compass-to-bearing$0.002
⚙️ Developer UtilitiesFree
Geohash decoder
latitude, longitude & cell error, free
Ssamurai
POST /geo/geohash-decode$0.002
⚙️ Developer UtilitiesFree
Great-circle path intersection
two bearings meet, free
Ssamurai
POST /geo/great-circle-intersection$0.002
⚙️ Developer UtilitiesFree
Magnetic to true bearing
declination conversion both ways, free
Ssamurai
POST /geo/magnetic-true-bearing$0.002
⚙️ Developer UtilitiesFree
Geographic polygon area
spherical m² from lat/lon ring, free
Ssamurai
POST /geo/polygon-area$0.002
⚙️ Developer UtilitiesFree
Rhumb line distance calculator
constant-bearing path, free
Ssamurai
POST /geo/rhumb-distance$0.002
⚙️ Developer UtilitiesFree
Map tile to lat/lon
slippy XYZ north-west corner, free
Ssamurai
POST /geo/tile-to-latlon$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.