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
Get your API key Browse the catalog
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_density →New⚙️ Developer UtilitiesVoltage regulation calculator% from no-load and full-load VSsamurai$0.002Open phys.voltage_regulation →New⚙️ Developer UtilitiesVickers hardness number calculatorHV from force and diagonalPPavilion$0.002Open phys.vickers_hardness_number →New⚙️ Developer UtilitiesVelocity calculatoraverage v = d/t in metres per secondAabuela$0.002Open phys.velocity →New⚙️ Developer UtilitiesValve flow coefficient calculatorCv from GPM, ΔP and GSsamurai$0.002Open phys.valve_flow_coefficient →New⚙️ Developer UtilitiesBarrel twist rate calculatorGreenhill formula, one turn per inchPPavilion$0.002Open phys.twist_rate →New⚙️ Developer UtilitiesTrue strain calculatorε_t = ln(1+ε) from engineering strainAabuela$0.002Open phys.true_strain →New⚙️ Developer UtilitiesTransmission coefficient calculatorpower T from η₁, η₂Ssamurai$0.002Open phys.transmission →New⚙️ Developer UtilitiesTorsional stiffness calculatorκ = GJ/L in N·m/rad, freePPavilion$0.002Open phys.torsional_stiffness →New⚙️ Developer UtilitiesTorsional spring calculatorκ = E d⁴ / (64 D N), N·mm/radAabuela$0.002Open phys.torsional_spring →New⚙️ Developer UtilitiesToilet paper race mass moment of inertiaI = ½m(ri²+ro²)Ssamurai$0.002Open phys.toilet_paper_race_mass_moment_inertia →New⚙️ Developer UtilitiesTime dilation calculatordilated time from proper time and velocityPPavilion$0.002Open phys.time_dilation →

Popular capabilities

Loved right now, by real traffic.

The full catalog

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

⚙️ Developer UtilitiesFree
RGB to RGB555 packer
8-bit RGB to 15-bit color, free
PPavilion
POST /color/rgb-rgb555$0.002
⚙️ Developer UtilitiesFree
RGB to RGB565 packer
8-bit color to 16-bit TFT word, free
Ssamurai
POST /color/rgb-rgb565$0.002
⚙️ Developer UtilitiesFree
Lateral area of a cone
curved surface π r l from radius and slant height
Hhedy
POST /math/lateral-area-of-cone$0.002
⚙️ Developer UtilitiesFree
Lateral area of a trapezoidal prism calculator
bases, legs, length
Ggrace
POST /math/lateral-area-trapezoidal-prism$0.002
⚙️ Developer UtilitiesFree
Extract color channel
red, green, blue or alpha as a number
PPavilion
POST /color/channel-extract$0.002
⚙️ Developer UtilitiesFree
Adjust color contrast by factor
mid-gray RGB scale, free
Ssamurai
POST /color/contrast-adjust$0.002
⚙️ Developer UtilitiesFree
Vivid light blend
combine two colors (color-burn or color-dodge)
Ssamurai
POST /color/vivid-light$0.002
⚙️ Developer UtilitiesFree
Lateral surface area of a cylinder
2 π r h from radius and height
Hhedy
POST /math/lateral-surface-area-cylinder$0.002
⚙️ Developer UtilitiesFree
Latus rectum calculator
parabola and ellipse focal chord length
Ggrace
POST /math/latus-rectum$0.002
⚙️ Developer UtilitiesFree
Law of cosines calculator
find a side or angle, free
Hhedy
POST /math/law-of-cosines$0.002
⚙️ Developer UtilitiesFree
Monochromatic palette generator
N lightness steps from one hue, free
PPavilion
POST /color/monochromatic$0.002
⚙️ Developer UtilitiesFree
Accessible text color suggester
meet WCAG contrast by lightness
Ssamurai
POST /color/suggest-accessible-text$0.002
⚙️ Developer UtilitiesFree
Hex to CSS variable
named custom property from hex, free
Ssamurai
POST /color/hex-to-css-var$0.002
⚙️ Developer UtilitiesFree
Is text legible on a background?
WCAG size-aware check
PPavilion
POST /color/safe-on-background$0.002
⚙️ Developer UtilitiesFree
Parse HSL string to RGB
CSS hsl() to red green blue, free
PPavilion
POST /color/hsl-string-to-rgb$0.002
⚙️ Developer UtilitiesFree
Paper-white tint adjust
preview a color on tinted stock
Ssamurai
POST /color/paper-white-adjust$0.002
⚙️ Developer UtilitiesFree
Average color of a list
mean RGB of a palette, free
PPavilion
POST /color/average-color$0.002
⚙️ Developer UtilitiesFree
Nearest Crayola color
closest classic crayon match, free
Ssamurai
POST /color/nearest-crayola$0.002
⚙️ Developer UtilitiesFree
Baking powder cups to grams converter
US cup density, free
PPavilion
POST /cook/baking-powder-cups-to-grams$0.002
⚙️ Developer UtilitiesFree
Baking soda teaspoons to grams converter
4.6 g/tsp, free
PPavilion
POST /cook/baking-soda-tsp-to-grams$0.002
⚙️ Developer UtilitiesFree
Butter sticks to cups converter
half cup per stick, free
Ssamurai
POST /cook/butter-sticks-to-cups$0.002
⚙️ Developer UtilitiesFree
Shredded cheese cups to grams converter
fixed density, free
Ssamurai
POST /cook/shredded-cheese-cups-to-grams$0.002
⚙️ Developer UtilitiesFree
Recipe scale by factor calculator
one ingredient × factor
PPavilion
POST /cook/scale-by-factor$0.002
⚙️ Developer UtilitiesFree
Batch recipe multiplier calculator
scale comma-separated ingredient list
Ssamurai
POST /cook/scale-ingredient-list$0.002
⚙️ Developer UtilitiesFree
Pancake batter ratio calculator
flour, milk and egg from pancake count
Ssamurai
POST /cook/pancake-ratio$0.002
⚙️ Developer UtilitiesFree
Simple syrup ratio calculator
sugar & water weights by ratio
PPavilion
POST /cook/simple-syrup-ratio$0.002
⚙️ Developer UtilitiesFree
Length and width of a rectangle from perimeter and side ratio
Ggrace
POST /math/length-and-width-of-rectangle-given-perimeter$0.002
⚙️ Developer UtilitiesFree
Pork roast time by weight
minutes per pound calculator
PPavilion
POST /cook/roast-pork-time$0.002
⚙️ Developer UtilitiesFree
Sous-vide water bath volume calculator
liters from tub minus food
Ssamurai
POST /cook/sousvide-water-volume$0.002
⚙️ Developer UtilitiesFree
Coffee beans from water volume calculator
brew ratio to grams
Ssamurai
POST /cook/coffee-beans-from-water$0.002
⚙️ Developer UtilitiesFree
Oatmeal oats-to-liquid ratio calculator
liquid from oat type
PPavilion
POST /cook/oatmeal-ratio$0.002
⚙️ Developer UtilitiesFree
Beer SRM color estimator
Morey SRM from MCU and volume
Ssamurai
POST /cook/beer-srm-color$0.002
⚙️ Developer UtilitiesFree
Dessert quantity per person calculator
servings from guest count
PPavilion
POST /cook/dessert-per-person$0.002
⚙️ Developer UtilitiesFree
Tea steeping temperature lookup
ideal water temp by tea type
PPavilion
POST /cook/tea-steep-temp$0.002
⚙️ Developer UtilitiesFree
Egg weight by size lookup
USDA shelled grams for S/M/L/XL/Jumbo
Ssamurai
POST /cook/egg-weight$0.002
⚙️ Developer UtilitiesFree
Count leading zeros calculator
CLZ / LZCNT at 8–64 bits
PPavilion
POST /dev/count-leading-zeros$0.002
⚙️ Developer UtilitiesFree
Byte-order swap calculator
reverse bytes, hex before and after
Ssamurai
POST /dev/byte-order-swap$0.002
⚙️ Developer UtilitiesFree
Decimal to fixed-point converter
Q-format integer, error and resolution
PPavilion
POST /dev/decimal-to-fixed-point$0.002
⚙️ Developer UtilitiesFree
Big integer addition calculator
exact unlimited-precision sum
Ssamurai
POST /dev/bignum-add$0.002
⚙️ Developer UtilitiesFree
CIDR first and last usable host calculator
exclude network and broadcast
PPavilion
POST /dev/cidr-first-last-host$0.002
⚙️ Developer UtilitiesFree
Subnet prefix cheatsheet
mask, wildcard and host counts
Ssamurai
POST /dev/subnet-hosts-table$0.002
⚙️ Developer UtilitiesFree
TCP flags decoder
SYN ACK FIN RST PSH URG from a byte
PPavilion
POST /dev/tcp-flags-decode$0.002
⚙️ Developer UtilitiesFree
Expected hash collisions calculator
n keys into m buckets
Ssamurai
POST /dev/hash-expected-collisions$0.002
⚙️ Developer UtilitiesFree
Binary heap parent index calculator
0-based and 1-based arrays
PPavilion
POST /dev/heap-parent-index$0.002
⚙️ Developer UtilitiesFree
Quadtree capacity calculator
max nodes and leaves by depth
Ssamurai
POST /dev/quadtree-capacity$0.002
⚙️ Developer UtilitiesFree
English word singularizer
plural noun to singular form
PPavilion
POST /dev/singularize-word$0.002
⚙️ Developer UtilitiesFree
Identifier naming case detector
camel, Pascal, snake, kebab
Ssamurai
POST /dev/identifier-case-detect$0.002
⚙️ Developer UtilitiesFree
SemVer version parser
parse major, minor, patch, build
PPavilion
POST /dev/semver-parse$0.002
⚙️ Developer UtilitiesFree
Data URI size calculator
Base64 overhead from byte size
PPavilion
POST /dev/data-uri-size$0.002
⚙️ Developer UtilitiesFree
UUID to integer converter
128-bit decimal and hex
Ssamurai
POST /dev/uuid-to-integer$0.002
⚙️ Developer UtilitiesFree
Hash table bucket count calculator
size m from n and load factor
Ssamurai
POST /dev/hash-table-capacity$0.002
⚙️ Developer UtilitiesFree
Future value annuity due calculator
beginning-of-period FV
PPavilion
POST /finance/future-value-annuity-due$0.002
⚙️ Developer UtilitiesFree
Loan monthly payment calculator
fixed PMT from principal and rate
Ssamurai
POST /finance/loan-monthly-payment$0.002
⚙️ Developer UtilitiesFree
Two loan comparison calculator
payment and total interest
PPavilion
POST /finance/loan-comparison$0.002
⚙️ Developer UtilitiesFree
Mortgage total cost calculator
full-life principal plus interest
Ssamurai
POST /finance/mortgage-total-cost$0.002
⚙️ Developer UtilitiesFree
Dividend yield calculator
annual dividend over share price
Ssamurai
POST /finance/dividend-yield$0.002
⚙️ Developer UtilitiesFree
FIRE target portfolio calculator
nest egg from expenses and SWR
PPavilion
POST /finance/fire-target-number$0.002
⚙️ Developer UtilitiesFree
Bond current yield calculator
annual coupon over market price
Ssamurai
POST /finance/bond-current-yield$0.002
⚙️ Developer UtilitiesFree
IRA growth calculator
project IRA balance from contributions
PPavilion
POST /finance/ira-growth$0.002
⚙️ Developer UtilitiesFree
Short vs long-term capital gains calculator
compare tax owed
PPavilion
POST /finance/capital-gains-short-vs-long$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.

Pay-as-you-go
Per task
$0.002+

The full API — 7500+ capabilities — billed only for what you run, from $0.002 per call. No monthly fee.

Balance
$10.00+

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

Recharge balance