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.
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7554ready-made tools
6channels
1API & key
$0.002per call, from
The full catalog
Search or filter by category. Every capability is its own endpoint with a published price.
📄 Documents & PDFFree
Flatten PDF form fields into static page content
B
POST /pdf/flatten-form$0.002📄 Documents & PDFFree
Convert PDF to grayscale
update every page color mode
F
POST /pdf/grayscale$0.002📄 Documents & PDFFree
Convert images to PDF
calculate page sizes from dimensions
B
POST /pdf/images-to-pdf$0.002📄 Documents & PDFFree
Insert a blank PDF page at any position
F
POST /pdf/insert-blank-page$0.002📄 Documents & PDFFree
Check PDF linearization and fast web view status
B
POST /pdf/linearize-check$0.002📄 Documents & PDFFree
List PDF form fields
names, types and current values
B
POST /pdf/list-form-fields$0.002📄 Documents & PDFFree
Merge PDF files online in the order you choose
F
POST /pdf/merge-files$0.002📄 Documents & PDFFree
N-up PDF pages
calculate grid and sheet size
B
POST /pdf/n-up-layout$0.002📄 Documents & PDFFree
Overlay two PDFs
describe each stacked page
B
POST /pdf/overlay-two-files$0.002📄 Documents & PDFFree
Count PDF pages
total pages and first-page size
F
POST /pdf/page-count$0.002📄 Documents & PDFFree
Build a PDF page thumbnail grid layout
M
POST /pdf/page-thumbnail-grid-layout$0.002📄 Documents & PDFFree
Set PDF permissions
validate print, copy, edit, and annotate flags
B
POST /pdf/permissions-set$0.002📄 Documents & PDFFree
Redact text in PDF
hide specified terms
B
POST /pdf/redact-text$0.002📄 Documents & PDFFree
Remove blank PDF pages and count the pages left
B
POST /pdf/remove-blank-pages$0.002📄 Documents & PDFFree
PDF Repair Diagnostic
Classify Structural Errors and Build a Repair Plan
B
POST /pdf/repair-report$0.002📄 Documents & PDFFree
Resize PDF page size
calculate the scale for A4, Letter and more
F
POST /pdf/resize-pages$0.002📄 Documents & PDFFree
Rotate PDF pages 90, 180, or 270 degrees
G
POST /pdf/rotate-pages$0.002📄 Documents & PDFFree
Set PDF metadata
validate title, author, subject and keywords
NA
POST /pdf/set-metadata$0.002📄 Documents & PDFFree
Explain PDF digital signature status and trust warnings
B
POST /pdf/signature-verify-status-explain$0.002📄 Documents & PDFFree
Split PDF by page range into a new file
F
POST /pdf/split-by-range$0.002📄 Documents & PDFFree
Split PDF every N pages into consecutive files
F
POST /pdf/split-every-n$0.002📄 Documents & PDFFree
Strip PDF metadata
clear an extracted metadata object
F
POST /pdf/strip-metadata$0.002📄 Documents & PDFFree
Generate a PDF table of contents from bookmarks
B
POST /pdf/table-of-contents$0.002📄 Documents & PDFFree
Extract PDF multi-column text in correct reading order
F
POST /pdf/text-extract-column-order$0.002📄 Documents & PDFFree
PDF to EPUB chapter structure from bookmarks
B
POST /pdf/to-epub-structure$0.002📄 Documents & PDFFree
PDF to image sequence
generate page filenames
B
POST /pdf/to-image-sequence$0.002⚙️ Developer UtilitiesFree
Pet life stage calculator
classify dogs and cats by age and size
B
POST /pet/age-life-stage-classify$0.002⚙️ Developer UtilitiesFree
Calculate next pet vaccination due date
K
POST /pet/vaccination-schedule-due$0.002⚙️ Developer UtilitiesFree
Acceleration due to gravity calculator
g at altitude in m/s², free
H
POST /phys/acceleration-due-to-gravity$0.002⚙️ Developer UtilitiesFree
Acceleration of a charged particle in an electric field
a = qE/m
H
POST /phys/acceleration-of-particle-in-electric-field$0.002⚙️ Developer UtilitiesFree
Acceleration calculator
a = F/m from force in N and mass in kg
H
POST /phys/acceleration-using-force-and-mass$0.002⚙️ Developer UtilitiesFree
Acoustic impedance calculator
Z = ρ·c in Rayls, free
H
POST /phys/acoustic-impedance$0.002⚙️ Developer UtilitiesFree
Air density calculator
kg/m³ from pressure, temperature and humidity
H
POST /phys/air-density$0.002⚙️ Developer UtilitiesFree
Air pressure at altitude calculator
barometric formula, hPa or inHg
H
POST /phys/air-pressure-at-altitude$0.002⚙️ Developer UtilitiesFree
Alfvén velocity calculator
v = B/√(μρ) in m/s, free
H
POST /phys/alfven-velocity$0.002⚙️ Developer UtilitiesFree
Alien civilizations calculator
Drake equation estimate
H
POST /phys/alien-civilization$0.002⚙️ Developer UtilitiesFree
Temperature at altitude calculator
standard lapse rate, °C or °F
H
POST /phys/altitude-temperature$0.002⚙️ Developer UtilitiesFree
Amp to wire size calculator
minimum copper AWG for current and length
H
POST /phys/amp-to-wire-size$0.002⚙️ Developer UtilitiesFree
Angle of incidence calculator
refraction angle from n1, n2, free
H
POST /phys/angle-of-incidence$0.002⚙️ Developer UtilitiesFree
Angle of refraction calculator
Snell's law with critical angle, free
H
POST /phys/angle-of-refraction$0.002⚙️ Developer UtilitiesFree
Angle of twist calculator
solid circular shaft torsion in radians, free
H
POST /phys/angle-of-twist$0.002⚙️ Developer UtilitiesFree
Angular frequency calculator
ω = 2πf from hertz to rad/s, free
H
POST /phys/angular-frequency$0.002⚙️ Developer UtilitiesFree
Angular resolution calculator
Rayleigh criterion in arcseconds, free
H
POST /phys/angular-resolution$0.002⚙️ Developer UtilitiesFree
Aperture area calculator
light-collecting area from diameter
H
POST /phys/aperture-area$0.002⚙️ Developer UtilitiesFree
API gravity calculator
degrees API from specific gravity, free
H
POST /phys/api-gravity$0.002⚙️ Developer UtilitiesFree
Arrow speed calculator
fps from draw weight, draw length and arrow mass
H
POST /phys/arrow-speed$0.002⚙️ Developer UtilitiesFree
Attenuation in dB
loss between input and output power levels
H
POST /phys/attenuation$0.002⚙️ Developer UtilitiesFree
Ballistic coefficient calculator
mass, drag coefficient and area
H
POST /phys/ballistic-coefficient$0.002⚙️ Developer UtilitiesFree
Bank angle calculator
level-turn bank from speed and radius
H
POST /phys/bank-angle$0.002⚙️ Developer UtilitiesFree
Barn-pole paradox calculator
Lorentz contraction and fit verdict
H
POST /phys/barn-pole-paradox$0.002⚙️ Developer UtilitiesFree
Belt length calculator
two pulleys and center distance, free
H
POST /phys/belt-length$0.002⚙️ Developer UtilitiesFree
Bend allowance calculator
arc length from angle, radius and K-factor
H
POST /phys/bend-allowance$0.002⚙️ Developer UtilitiesFree
Binoculars range calculator
maximum resolving distance
H
POST /phys/binoculars-range$0.002⚙️ Developer UtilitiesFree
Biot number calculator
Bi = h·L/k, lumped-capacitance, free
H
POST /phys/biot-numer$0.002⚙️ Developer UtilitiesFree
Rent vs buy cost calculator
compare total housing costs
B
POST /realestate/rent-vs-buy-compare$0.002⚙️ Developer UtilitiesFree
Build a Content-Security-Policy header from allowed sources
R
POST /security/csp-header-build$0.002⚙️ Developer UtilitiesFree
Convert Unix permissions between symbolic and octal
B
POST /security/file-permission-symbolic-convert$0.002⚙️ Developer UtilitiesFree
Seeded memorable passphrase generator
deterministic Diceware-style words
F
POST /security/passphrase-generate-seeded$0.002📈 SEOFree
Check image alt text coverage
find missing and generic alt attributes
K
POST /seo/alt-text-coverage$0.002📈 SEOFree
Anchor Text Diversity Checker
Spot Link Over-Optimization
R
POST /seo/anchor-text-diversity$0.002No capabilities match your search.
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.