Developer Utilities
Small developer utilities that save a trip to a random website. Encode and decode Base64, explain a regex, build UTM links, generate QR codes and vCards, and more — the everyday helpers. Free in your browser, and available by API when you need them in a script.
Developer Utilities
Convert RGB to CMYK
accurate percentage calculator
POST /color/rgb-to-cmyk$0.002Developer Utilities
Convert RGB color to hex
get a 6-digit color code
POST /color/rgb-to-hex$0.002Developer Utilities
Convert RGB to HSL
hue, saturation and lightness
POST /color/rgb-to-hsl$0.002Developer Utilities
Convert color temperature to RGB
Kelvin to RGB calculator
POST /color/temperature-kelvin-to-rgb$0.002Developer Utilities
Generate a triadic color palette from any hex color
POST /color/triadic-palette$0.002Developer Utilities
Columbus Day date calculator
Indigenous Peoples' Day free
POST /date/columbus-day-us$0.002Developer Utilities
Juneteenth date calculator
federal observed day free
POST /date/juneteenth-observed$0.002Developer Utilities
MLK Day date calculator
Martin Luther King Jr. Day free
POST /date/mlk-day-us$0.002Developer Utilities
Presidents' Day date calculator
Washington's Birthday free
POST /date/presidents-day-us$0.002Developer Utilities
Minify CSS code and measure the size reduction
POST /dev2/minify-css$0.002Developer Utilities
Compute an exponential backoff schedule for retries
POST /dev2/retry-backoff-schedule$0.002Developer Utilities
A1Z26 cipher
letters to numbers 1–26 & decode, free
POST /enc/a1z26$0.002Developer Utilities
RFC 1924 Base85 encoder & decoder
compact IPv6 alphabet, free
POST /enc/base85-rfc1924$0.002Developer Utilities
Ternary / base-3 converter
decimal ↔ base 3, free
POST /enc/base-ternary$0.002Developer Utilities
Factorial number system converter
factoradic encode & decode, free
POST /enc/factoradic$0.002Developer Utilities
Portugal NIF check digit calculator and validator
POST /enc/nif-portugal$0.002Developer Utilities
Accrual ratio calculator
share of earnings from accruals
POST /fin/accrual-ratio$0.002Developer Utilities
Accumulated depreciation calculator
straight-line depreciation to date
POST /fin/accumulated-depreciation$0.002Developer Utilities
Actual cash value
replacement cost minus depreciation
POST /fin/actual-cash-value$0.002Developer Utilities
ADR to ordinary share price converter
ratio and FX, free
POST /fin/adr$0.002Developer Utilities
AFFO
adjusted funds from operations from net income
POST /fin/affo$0.002Developer Utilities
AFN
additional funds needed from projected growth
POST /fin/afn$0.002Developer Utilities
After-tax cost of debt
effective borrowing rate after the tax shield
POST /fin/after-tax-cost-of-debt$0.002Developer Utilities
AGI
adjusted gross income from gross income and deductions
POST /fin/agi$0.002Developer Utilities
Alabama income tax calculator
state tax owed by filing status
POST /fin/alabama-tax$0.002Developer Utilities
Alternative minimum tax calculator
AMT owed from income and preferences
POST /fin/alternative-minimum-tax$0.002Developer Utilities
Altman Z-score calculator
bankruptcy risk from five financial ratios
POST /fin/altman-z-score$0.002Developer Utilities
American Rescue Plan stimulus
payment from AGI, status and dependents
POST /fin/american-rescue-plan$0.002Developer Utilities
Amortization schedule calculator
principal and interest per payment
POST /fin/amortization$0.002Developer Utilities
Annual income calculator
yearly income from hourly wage, hours and weeks
POST /fin/annual-income$0.002Developer Utilities
Annual pay calculator
yearly earnings from hourly wage, hours and weeks
POST /fin/annual-pay$0.002Developer Utilities
Annual salary calculator
gross and net yearly pay from monthly salary
POST /fin/annual-salary$0.002Developer Utilities
Annual salary per hour
convert yearly pay to an hourly rate free
POST /fin/annual-salary-per-hour$0.002Developer Utilities
Annual to monthly salary converter
twelve equal monthly amounts
POST /fin/annual-to-monthly-salary$0.002Developer Utilities
Annualized rate of return
yearly percentage from value and years
POST /fin/annualized-rate-of-return$0.002Developer Utilities
Annuity payment calculator
periodic payment from principal and rate
POST /fin/annuity$0.002Developer Utilities
Annuity future value calculator
growth of equal periodic payments
POST /fin/annuity-future-value$0.002Developer Utilities
Annuity present value calculator
worth of equal periodic payments
POST /fin/annuity-present-value$0.002Developer Utilities
Average propensity to consume (APC)
consumption over disposable income
POST /fin/apc$0.002Developer Utilities
Appreciation calculator
future value of an asset at a fixed annual rate
POST /fin/appreciation$0.002Developer Utilities
APR calculator
effective annual rate from nominal rate and compounding
POST /fin/apr$0.002Developer Utilities
APY calculator
annual percentage yield from a nominal rate
POST /fin/apy$0.002Developer Utilities
Office supply budget per employee calculator
monthly and annual totals
POST /final3/small-business-break-room-supply-budget$0.002Developer Utilities
Calculate barbell plate loading per side
POST /fitness2/plate-math-calculate$0.002Developer Utilities
Basic will planning checklist by family situation
POST /legal2/will-basic-checklist$0.002Developer Utilities
a+bi form converter
rectangular and polar form of a complex number
POST /math/a-bi-form$0.002Developer Utilities
AAS triangle calculator
two angles and a non-included side
POST /math/aas-triangle$0.002Developer Utilities
ABC triangle solver
sides and angles from any combination
POST /math/abc-triangle$0.002Developer Utilities
Absolute change calculator
non-negative difference between two numbers
POST /math/absolute-change$0.002Developer Utilities
Absolute value equation solver
solve |ax+b|=c for x
POST /math/absolute-value-equation$0.002Developer Utilities
Absolute value inequality solver
solve |ax+b| < c and get the interval
POST /math/absolute-value-inequalities$0.002Developer Utilities
Acute triangle calculator
check three sides, free
POST /math/acute-triangle$0.002Developer Utilities
Add or subtract polynomials
coefficient arrays in, result out
POST /math/add-subtract-polynomials$0.002Developer Utilities
Adding and subtracting fractions
simplified result, free in your browser
POST /math/adding-and-subtracting-fractions$0.002Developer Utilities
Adding fractions
simplified sum of two fractions, free in your browser
POST /math/adding-fractions$0.002Developer Utilities
Addition calculator
sum two or more numbers, free online
POST /math/addition$0.002Developer Utilities
Adjoint matrix calculator
adjugate adj(A) from cofactors, free
POST /math/adjoint-matrix$0.002Developer Utilities
Logical AND calculator
conjunction of two booleans, free
POST /math/and$0.002Developer Utilities
Angle of a right triangle from two sides, in degrees
POST /math/angle-of-right-triangle$0.002Developer Utilities
Antilog calculator
antilogarithm of a value for any positive base, free
POST /math/antilog$0.002