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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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.
⚙️ Developer UtilitiesFree
Minguo ROC to Gregorian date converter
B
POST /date/minguo-to-gregorian$0.002⚙️ Developer UtilitiesFree
Modified Julian Day to date converter
Gregorian UTC
B
POST /date/mjd-to-date$0.002⚙️ Developer UtilitiesFree
Persian Jalali to Gregorian date converter
K
POST /date/persian-to-gregorian$0.002⚙️ Developer UtilitiesFree
Shrove Tuesday date
calculate Mardi Gras for any year
F
POST /date/shrove-tuesday$0.002⚙️ Developer UtilitiesFree
Truncate datetime to unit
year, month, day, hour, minute in UTC
S
POST /date/truncate-to-unit$0.002⚙️ Developer UtilitiesFree
Week number with custom first day
any weekday start, free
S
POST /date/week-number-custom-start$0.002⚙️ Developer UtilitiesFree
Weekday of New Year's Day
January 1 calculator
B
POST /date/weekday-of-new-year$0.002⚙️ Developer UtilitiesFree
Black Friday date calculator by year
K
POST /date/black-friday$0.002⚙️ Developer UtilitiesFree
Easter Monday date
Gregorian Easter Sunday plus one day by year
S
POST /date/easter-monday$0.002⚙️ Developer UtilitiesFree
Tabular Eid al-Adha date
Hijri to Gregorian calculator
K
POST /date/eid-al-adha-tabular$0.002⚙️ Developer UtilitiesFree
US Father's Day date
third Sunday of June calculator
B
POST /date/fathers-day-us$0.002⚙️ Developer UtilitiesFree
Groundhog Day date and weekday calculator by year
F
POST /date/groundhog-day$0.002⚙️ Developer UtilitiesFree
Memorial Day date calculator
last Monday of May, free
A
POST /date/memorial-day$0.002⚙️ Developer UtilitiesFree
Palm Sunday date
Sunday before Gregorian Easter for any year
P
POST /date/palm-sunday$0.002⚙️ Developer UtilitiesFree
Approximate Autumnal Equinox Date and Time Calculator
K
POST /date/autumnal-equinox-approx$0.002⚙️ Developer UtilitiesFree
EU daylight saving start date
last Sunday of March, free
P
POST /date/daylight-saving-start-eu$0.002⚙️ Developer UtilitiesFree
Approximate Holi date calculator
lunar full moon rule
F
POST /date/holi-approx$0.002⚙️ Developer UtilitiesFree
Meteorological season of a date
fixed months by hemisphere
S
POST /date/meteorological-season$0.002⚙️ Developer UtilitiesFree
Passover Start Date Calculator by Year
B
POST /date/passover-start$0.002⚙️ Developer UtilitiesFree
Rosh Hashanah date calculator
Gregorian from Hebrew calendar
A
POST /date/rosh-hashanah$0.002⚙️ Developer UtilitiesFree
UK summer bank holiday date
last Monday of August, free
S
POST /date/uk-summer-bank-holiday$0.002⚙️ Developer UtilitiesFree
Subtract two HMS durations
hours, minutes and seconds calculator
B
POST /date/hms-subtract$0.002⚙️ Developer UtilitiesFree
Hours minutes seconds to seconds
clock duration converter
P
POST /date/hms-to-seconds$0.002⚙️ Developer UtilitiesFree
Total duration of time intervals
merge overlaps in UTC
S
POST /date/intervals-total-duration$0.002⚙️ Developer UtilitiesFree
Add two ISO 8601 durations
combine and normalize PnYnMnDTnHnMnS
A
POST /date/iso-duration-add$0.002⚙️ Developer UtilitiesFree
Overlapping time of two intervals calculator
K
POST /date/overlap-duration$0.002⚙️ Developer UtilitiesFree
Stopwatch split times
cumulative splits to lap durations
A
POST /date/stopwatch-split-times$0.002⚙️ Developer UtilitiesFree
Clock time to decimal minutes
minutes past midnight calculator
F
POST /date/time-to-decimal-minutes$0.002⚙️ Developer UtilitiesFree
Working hours between two datetimes
UTC business time calculator
B
POST /date/working-hours-between$0.002⚙️ Developer UtilitiesFree
Age in total weeks
whole weeks lived from birth date to reference date
P
POST /date/age-in-weeks$0.002⚙️ Developer UtilitiesFree
Weekday of a birthday in any year
K
POST /date/birthday-weekday$0.002⚙️ Developer UtilitiesFree
Hours difference between UTC offsets
signed fixed-offset calculator
F
POST /date/offset-difference-hours$0.002⚙️ Developer UtilitiesFree
Pregnancy week from last period
gestational age in weeks + days
S
POST /date/pregnancy-week-from-lmp$0.002⚙️ Developer UtilitiesFree
Retirement date from birthdate
calculate your eligibility date
B
POST /date/retirement-date$0.002⚙️ Developer UtilitiesFree
Timesheet hours total
calculate work hours minus breaks
F
POST /date/timesheet-total$0.002⚙️ Developer UtilitiesFree
Convert time between UTC offsets
fixed offset wall clock, free
A
POST /date/convert-between-offsets$0.002⚙️ Developer UtilitiesFree
Day fraction to clock time
hours, minutes and seconds converter
F
POST /date/day-fraction-to-time$0.002⚙️ Developer UtilitiesFree
Length of daylight calculator by date and latitude
K
POST /date/day-length-approx$0.002⚙️ Developer UtilitiesFree
GMT offset label formatter
turn minutes into friendly text
K
POST /date/gmt-offset-label$0.002⚙️ Developer UtilitiesFree
JavaScript timestamp to ISO 8601 converter
B
POST /date/js-timestamp-to-iso$0.002⚙️ Developer UtilitiesFree
Swatch Internet Time
ISO datetime to .beats (Biel Mean Time)
S
POST /date/swatch-internet-time$0.002⚙️ Developer UtilitiesFree
Unix seconds to ISO 8601
epoch timestamp to UTC datetime
P
POST /date/unix-seconds-to-iso$0.002⚙️ Developer UtilitiesFree
Approximate equation of time
sundial to clock offset in minutes, free
A
POST /date/equation-of-time-approx$0.002⚙️ Developer UtilitiesFree
Moon age in days calculator for any date
B
POST /date/moon-age-days$0.002⚙️ Developer UtilitiesFree
Power from current and resistance
P=I²R calculator, free
S
POST /elec/power-i2r$0.002⚙️ Developer UtilitiesFree
Resistance from power and voltage calculator
R = V² / P
F
POST /elec/resistance-from-power-voltage$0.002⚙️ Developer UtilitiesFree
Voltage drop percentage calculator
check circuit regulation
B
POST /elec/voltage-drop-percent$0.002⚙️ Developer UtilitiesFree
Voltage from power and current calculator
watts and amps to volts
K
POST /elec/voltage-from-power-current$0.002⚙️ Developer UtilitiesFree
Charge from current and time calculator
Q=I·t coulombs free
S
POST /elec/charge-current-time-q$0.002⚙️ Developer UtilitiesFree
Kirchhoff voltage law calculator
single-loop KVL unknown voltage
P
POST /elec/kirchhoff-voltage-law$0.002⚙️ Developer UtilitiesFree
Norton equivalent calculator
current source and parallel resistance
F
POST /elec/norton-equivalent$0.002⚙️ Developer UtilitiesFree
Resistor power dissipation calculator
safe wattage with margin
A
POST /elec/resistor-power-dissipation$0.002⚙️ Developer UtilitiesFree
EIA-96 SMD resistor code calculator
decode 2-digit + letter codes
A
POST /elec/resistor-smd-eia96$0.002⚙️ Developer UtilitiesFree
Two resistor parallel calculator
product over sum
K
POST /elec/two-resistors-parallel$0.002⚙️ Developer UtilitiesFree
Voltage divider resistor calculator
find R2 from Vin, Vout and R1
B
POST /elec/voltage-divider-resistor$0.002⚙️ Developer UtilitiesFree
Capacitance to capacitor code calculator
convert values to 3 digits
F
POST /elec/capacitor-code-encode$0.002⚙️ Developer UtilitiesFree
NTC thermistor beta resistance calculator
F
POST /elec/ntc-thermistor-resistance$0.002⚙️ Developer UtilitiesFree
Pull-up resistor current calculator
logic-low sink current
B
POST /elec/pull-up-resistor$0.002⚙️ Developer UtilitiesFree
Five-band resistor color code calculator
ohms and tolerance
P
POST /elec/resistor-color-5band$0.002⚙️ Developer UtilitiesFree
Resistor tolerance range calculator
min and max ohms from %
S
POST /elec/resistor-tolerance-range$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.