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.
⚙️ Developer UtilitiesFree
Wallpaper paste calculator
paste from rolls and coverage per roll
P
POST /home/wallpaper-paste$0.002⚙️ Developer UtilitiesFree
Water heater sizing calculator
tank from occupants and peak demand
P
POST /home/water-heater-sizing$0.002⚙️ Developer UtilitiesFree
Wire ampacity calculator
safe current by gauge and insulation
A
POST /home/wire-ampacity-lookup$0.002⚙️ Developer UtilitiesFree
Wire resistance run calculator
gauge, length & material
P
POST /home/wire-resistance-run$0.002⚙️ Developer UtilitiesFree
Collatz sequence calculator
steps, peak and full hailstone path
S
POST /math/collatz$0.002⚙️ Developer UtilitiesFree
GCD and LCM of multiple numbers free
S
POST /math/gcd-lcm$0.002✍️ Text & AIFree
Atbash cipher encoder/decoder
free online
A
POST /text/atbash$0.002⚙️ Developer UtilitiesFree
Caballería area converter
free
A
POST /conv/caballeria-area$0.002⚙️ Developer UtilitiesFree
Cantaro / kantar mass converter
free
A
POST /conv/cantaro-mass$0.002⚙️ Developer UtilitiesFree
Chinese chi/cun length converter
free
A
POST /conv/chi-cun-length$0.002⚙️ Developer UtilitiesFree
cmH₂O pressure converter
free
A
POST /conv/cmh2o-pressure$0.002⚙️ Developer UtilitiesFree
Dirham (mass) converter
free
A
POST /conv/dirham-mass$0.002⚙️ Developer UtilitiesFree
Fanegada area converter
free
A
POST /conv/fanegada-area$0.002⚙️ Developer UtilitiesFree
Firkin (beer) volume converter
free
A
POST /conv/firkin-volume$0.002⚙️ Developer UtilitiesFree
Geologic rate converter
free
A
POST /conv/geologic-rate$0.002⚙️ Developer UtilitiesFree
Mithqal mass converter
free
A
POST /conv/mithqal-mass$0.002⚙️ Developer UtilitiesFree
Newton temperature scale converter
free
A
POST /conv/newton-temperature$0.002⚙️ Developer UtilitiesFree
Parasang / farsakh converter
free
A
POST /conv/parasang-length$0.002⚙️ Developer UtilitiesFree
French toise length converter
free
A
POST /conv/toise-length$0.002⚙️ Developer UtilitiesFree
ISO 8601 week number
week and week-year from any date
A
POST /date/week-number$0.002⚙️ Developer UtilitiesFree
Fixture unit demand calculator
peak water GPM from FU
S
POST /home/fixture-unit-demand$0.002⚙️ Developer UtilitiesFree
Lawn mowing area calculator
area, passes, and mowing time
S
POST /home/lawn-mowing-area$0.002⚙️ Developer UtilitiesFree
Overseeding calculator
seed pounds from lawn area and rate per 1000 ft²
P
POST /home/overseeding$0.002⚙️ Developer UtilitiesFree
PEX tubing calculator
total length from fixtures and average run
P
POST /home/pex-tubing$0.002⚙️ Developer UtilitiesFree
Pipe water weight calculator
water mass in a filled pipe for hangers
A
POST /home/pipe-water-weight$0.002⚙️ Developer UtilitiesFree
Play sand calculator
bags and tons for a sandbox by size and depth
A
POST /home/play-sand$0.002⚙️ Developer UtilitiesFree
Raised bed soil calculator
fill volume from length, width and height free
S
POST /home/raised-bed-soil$0.002⚙️ Developer UtilitiesFree
Septic tank sizing calculator
capacity from bedrooms and occupants
A
POST /home/septic-tank-sizing$0.002⚙️ Developer UtilitiesFree
Solar panel count calculator
panels from monthly kWh and sun hours
A
POST /home/solar-panel-count$0.002⚙️ Developer UtilitiesFree
Sprinkler head count calculator
heads from lawn area and coverage
P
POST /home/sprinkler-head-count$0.002⚙️ Developer UtilitiesFree
Subpanel feeder calculator
wire size & breaker from load and distance
S
POST /home/subpanel-feeder$0.002⚙️ Developer UtilitiesFree
Toilet water usage calculator
daily & yearly gallons from GPF
S
POST /home/toilet-water-usage$0.002⚙️ Developer UtilitiesFree
Transformer sizing calculator
kVA from load and voltage
P
POST /home/transformer-sizing$0.002⚙️ Developer UtilitiesFree
Water service line calculator
size pipe from demand and street pressure
P
POST /home/water-service-line$0.002🎧 Audio & VoiceFree
Align transcript to SRT timestamps
create timed subtitles
B
POST /audio/audio-to-text-srt-align$0.002🎧 Audio & VoiceFree
Audiobook playback duration calculator
listening time by speed
F
POST /audio/audiobook-speed-duration$0.002🎧 Audio & VoiceFree
Audio file size calculator
estimate MB from duration and bitrate
R
POST /audio/bitrate-estimate$0.002🎧 Audio & VoiceFree
Convert audio channel layout
mono, stereo and 5.1 mapping rules
R
POST /audio/channel-layout-convert$0.002🎧 Audio & VoiceFree
Crossfade duration calculator
combined length and overlap window
K
POST /audio/crossfade-duration$0.002🎧 Audio & VoiceFree
Convert decibels to linear amplitude
dB amplitude calculator
B
POST /audio/decibel-to-linear$0.002🎧 Audio & VoiceFree
DTMF Tone Frequency Lookup for Telephone Keypad Keys
K
POST /audio/dtmf-tone-lookup$0.002🎧 Audio & VoiceFree
Audio fade envelope calculator
compute gain breakpoints
K
POST /audio/fade-in-out$0.002🎧 Audio & VoiceFree
Generate a metronome click track specification from BPM and bars
F
POST /audio/metronome-click-track$0.002🎧 Audio & VoiceFree
Loudness normalization gain calculator
LUFS target adjustment
M
POST /audio/normalize-loudness$0.002🎧 Audio & VoiceFree
Pitch shift frequency ratio calculator
semitones to Hz
B
POST /audio/pitch-shift-semitones$0.002🎧 Audio & VoiceFree
Podcast chapter timestamp formatter
create HH:MM:SS markers
M
POST /audio/podcast-chapter-timestamps$0.002🎧 Audio & VoiceFree
Sample rate conversion ratio calculator
upsample or downsample
M
POST /audio/sample-rate-convert$0.002🎧 Audio & VoiceFree
Silence detection threshold calculator for audio
F
POST /audio/silence-detect-thresholds$0.002🎧 Audio & VoiceFree
Audio tempo change calculator
BPM percentage and duration
K
POST /audio/tempo-change-percent$0.002🎧 Audio & VoiceFree
Trim audio by timestamp
validate start and end times
M
POST /audio/trim-by-timestamp$0.002🎧 Audio & VoiceFree
Adjust audio volume in decibels
peak level and clipping calculator
B
POST /audio/volume-adjust-db$0.002⚙️ Developer UtilitiesFree
Calculate daily calorie needs from BMR and activity level
B
POST /calc2/calorie-needs-activity$0.002⚙️ Developer UtilitiesFree
Calculate tip and split a bill
total and share per person
G
POST /calc2/tip-split-bill$0.002⚙️ Developer UtilitiesFree
Calculate Recommended Daily Water Intake by Weight
F
POST /calc2/water-intake-recommend$0.002⚙️ Developer UtilitiesFree
Calculate grade needed on final exam
required score calculator
B
POST /calc3/grade-needed-final-exam$0.002⚙️ Developer UtilitiesFree
Generate an analogous color palette from any hex color
K
POST /color/analogous-palette$0.002⚙️ Developer UtilitiesFree
Color Blindness Simulator for Protanopia, Deuteranopia, and Tritanopia
M
POST /color/blindness-simulate$0.002⚙️ Developer UtilitiesFree
Convert CMYK to RGB
percentage to 0–255 values
R
POST /color/cmyk-to-rgb$0.002⚙️ Developer UtilitiesFree
Compute WCAG color contrast ratio
AA and AAA results
B
POST /color/contrast-ratio-wcag$0.002⚙️ Developer UtilitiesFree
Expand hex color shorthand
#RGB to #RRGGBB, free
B
POST /color/hex-shorthand-expand$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.