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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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
EAN-13 check digit calculator
compute and validate free
Ssamurai
POST /enc/ean-check$0.002
⚙️ Developer UtilitiesFree
EBCDIC encoder
ASCII ↔ IBM code page 037, free
Ssamurai
POST /enc/ebcdic$0.002
⚙️ Developer UtilitiesFree
Ecoji emoji encoder
encode and decode base-1024 emoji text
Ssamurai
POST /enc/ecoji$0.002
⚙️ Developer UtilitiesFree
Bulgarian EGN check digit
compute and validate free online
PPavilion
POST /enc/egn-bulgaria$0.002
⚙️ Developer UtilitiesFree
US EIN format validator
check prefix and IRS campus free
PPavilion
POST /enc/ein-us$0.002
⚙️ Developer UtilitiesFree
HTML named to numeric entities
© ↔ ©, free
PPavilion
POST /enc/entity-named-to-numeric$0.002
⚙️ Developer UtilitiesFree
Fibonacci coding (Zeckendorf)
encode and decode positive integers
Ssamurai
POST /enc/fibonacci-coding$0.002
⚙️ Developer UtilitiesFree
Fletcher-32 checksum
16-bit word hex calculator, free
PPavilion
POST /enc/fletcher32$0.002
⚙️ Developer UtilitiesFree
Norwegian fødselsnummer check digits
compute and validate free
PPavilion
POST /enc/fnr-norway$0.002
⚙️ Developer UtilitiesFree
FNV-1 hash calculator
32/64-bit hex non-cryptographic hash
Ssamurai
POST /enc/fnv1$0.002
⚙️ Developer UtilitiesFree
FNV-1a hash
32 and 64 bit non-cryptographic calculator, free
PPavilion
POST /enc/fnv1a$0.002
⚙️ Developer UtilitiesFree
Fractionated Morse
encrypt or decrypt with a keyword alphabet, free
PPavilion
POST /enc/fractionated-morse$0.002
⚙️ Developer UtilitiesFree
Unicode Fraktur text
convert letters to blackletter Fraktur and back
Aabuela
POST /enc/fraktur-unicode$0.002
⚙️ Developer UtilitiesFree
French spelling alphabet
Anatole Berthe Célestin encode & decode, free
Ssamurai
POST /enc/french-spelling$0.002
⚙️ Developer UtilitiesFree
English gematria calculator
A=6, B=12 word value free
Aabuela
POST /enc/gematria-english$0.002
⚙️ Developer UtilitiesFree
Hebrew gematria calculator
letter values and total free
PPavilion
POST /enc/gematria-hebrew$0.002
⚙️ Developer UtilitiesFree
Ordinal gematria calculator
A=1 to Z=26 word value free
Aabuela
POST /enc/gematria-ordinal$0.002
⚙️ Developer UtilitiesFree
Gibberish language translator
idig encode and decode free
PPavilion
POST /enc/gibberish-gik$0.002
⚙️ Developer UtilitiesFree
Grandpré cipher
encrypt & decrypt with keyword-row coordinates, free
Aabuela
POST /enc/grandpre$0.002
⚙️ Developer UtilitiesFree
Turning grille cipher
encrypt & decrypt with a rotating mask
Aabuela
POST /enc/grille-cipher$0.002
⚙️ Developer UtilitiesFree
India GSTIN check digit
compute or validate base-36 checksum
Aabuela
POST /enc/gstin-india$0.002
⚙️ Developer UtilitiesFree
GTIN-14 check digit
compute from 13 digits or validate a 14-digit code
Aabuela
POST /enc/gtin14$0.002
⚙️ Developer UtilitiesFree
Hex dump viewer
offsets, hex columns and ASCII gutter, free
Aabuela
POST /enc/hexdump$0.002
⚙️ Developer UtilitiesFree
Hill cipher 2×2
encrypt & decrypt with a key matrix mod 26
Ssamurai
POST /enc/hill-2x2$0.002
⚙️ Developer UtilitiesFree
Hill cipher 3×3
encrypt or decrypt with a nine-number key matrix, free
PPavilion
POST /enc/hill-3x3$0.002
⚙️ Developer UtilitiesFree
Hong Kong ID check digit
compute and validate free
PPavilion
POST /enc/hkid$0.002
⚙️ Developer UtilitiesFree
Homoglyph text converter
Latin ↔ confusable Unicode
Aabuela
POST /enc/homoglyph$0.002
⚙️ Developer UtilitiesFree
Decimal HTML entities converter
&#N; encode and decode, free
Aabuela
POST /enc/html-entities-decimal$0.002
⚙️ Developer UtilitiesFree
Named HTML entities encoder and decoder
amp, lt, copy, nbsp
Ssamurai
POST /enc/html-entities-named$0.002
⚙️ Developer UtilitiesFree
IBAN check digit generator
mod 97-10 from country, bank and account
Ssamurai
POST /enc/iban-generate$0.002
⚙️ Developer UtilitiesFree
IDNA domain encoder
Unicode hostnames to xn-- and back, free
Aabuela
POST /enc/idna$0.002
⚙️ Developer UtilitiesFree
IMEI check digit
compute Luhn for 14 digits or validate a 15-digit IMEI
Aabuela
POST /enc/imei$0.002
⚙️ Developer UtilitiesFree
Intel HEX encoder
encode, decode and verify firmware records free
Ssamurai
POST /enc/intel-hex$0.002
⚙️ Developer UtilitiesFree
Internet checksum (RFC 1071)
IP/TCP/UDP 16-bit calculator, free
PPavilion
POST /enc/internet-checksum$0.002
⚙️ Developer UtilitiesFree
ISBN-10 check digit
compute and validate free, X for ten
PPavilion
POST /enc/isbn10$0.002
⚙️ Developer UtilitiesFree
ISBN-13 check digit
compute from 12 digits or validate a 13-digit barcode
Aabuela
POST /enc/isbn13$0.002
⚙️ Developer UtilitiesFree
ISBN-10 to ISBN-13 converter
check digit both ways free
Ssamurai
POST /enc/isbn-convert$0.002
⚙️ Developer UtilitiesFree
ISIN check digit
compute Luhn for 11-char body or validate a 12-char ISIN
Aabuela
POST /enc/isin$0.002
⚙️ Developer UtilitiesFree
ISMN check digit
compute and validate thirteen-digit music numbers free
PPavilion
POST /enc/ismn$0.002
⚙️ Developer UtilitiesFree
ISO 7064 check digit
MOD 11-2 and MOD 37-2 free
PPavilion
POST /enc/iso7064$0.002
⚙️ Developer UtilitiesFree
Wabun Morse code translator
Japanese kana encode & decode free
Ssamurai
POST /enc/japanese-wabun$0.002
⚙️ Developer UtilitiesFree
JMBG check digit
compute or validate the Yugoslav number
Aabuela
POST /enc/jmbg$0.002
⚙️ Developer UtilitiesFree
JavaScript string escaper
escape & unescape quotes, newlines, unicode
Ssamurai
POST /enc/js-string-escape$0.002
⚙️ Developer UtilitiesFree
JSON string escaper
escape & unescape quotes, backslashes, controls
Aabuela
POST /enc/json-string-escape$0.002
⚙️ Developer UtilitiesFree
Iceland kennitala check digit
compute or validate the mod-11 digit
Aabuela
POST /enc/kennitala-iceland$0.002
⚙️ Developer UtilitiesFree
Keyboard coordinate cipher
QWERTY row/column encode & decode, free
Ssamurai
POST /enc/keyboard-coords$0.002
⚙️ Developer UtilitiesFree
LaTeX escaper
escape & unescape \, &, %, $, _ and other specials
Ssamurai
POST /enc/latex-escape$0.002
⚙️ Developer UtilitiesFree
LDAP DN escaper
escape & unescape RFC 4514 components
Aabuela
POST /enc/ldap-dn-escape$0.002
⚙️ Developer UtilitiesFree
Longitudinal redundancy check (LRC)
XOR check byte in hex
Ssamurai
POST /enc/lrc$0.002
⚙️ Developer UtilitiesFree
Luhn mod-10 check digit
compute and validate any number string free
PPavilion
POST /enc/luhn$0.002
⚙️ Developer UtilitiesFree
Luhn mod N check character
any alphabet, free in browser
Ssamurai
POST /enc/luhn-mod-n$0.002
⚙️ Developer UtilitiesFree
Mailto link builder
encode subject, body, cc and bcc free
Ssamurai
POST /enc/mailto-encode$0.002
⚙️ Developer UtilitiesFree
Markdown escaper
escape & unescape specials for literal text
Aabuela
POST /enc/markdown-escape$0.002
⚙️ Developer UtilitiesFree
Match Rating Approach codex
phonetic name code free online
Ssamurai
POST /enc/match-rating$0.002
⚙️ Developer UtilitiesFree
Unicode bold text
mathematical bold letters and digits for social media
Aabuela
POST /enc/mathematical-bold$0.002
⚙️ Developer UtilitiesFree
Australia Medicare check digit
compute or validate card numbers
Aabuela
POST /enc/medicare-australia$0.002
⚙️ Developer UtilitiesFree
MEID check digit calculator
compute and validate free
Ssamurai
POST /enc/meid$0.002
⚙️ Developer UtilitiesFree
MIME B encoded-word
wrap and unwrap Base64 charset headers, free
Aabuela
POST /enc/mime-b-encoding$0.002
⚙️ Developer UtilitiesFree
ISO 7064 mod-11 check digit
compute and validate (X for 10)
Aabuela
POST /enc/mod11$0.002
⚙️ Developer UtilitiesFree
ISO 7064 mod 97-10 check digits
compute and validate free
Ssamurai
POST /enc/mod97$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.

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