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
Burger grilling time by thickness and doneness calculator
POST /cook/grill-burger-time$0.002Developer Utilities
Grilling Fish Time by Thickness Calculator
POST /cook/grill-fish-time$0.002Developer Utilities
Sauce Reduction Volume Calculator
Find the Final Volume
POST /cook/reduction-ratio$0.002Developer Utilities
Vegetable steaming time lookup
how long to steam broccoli, carrots & more
POST /cook/steam-time$0.002Developer Utilities
Turkey brine recipe calculator
water, salt & sugar by bird weight
POST /cook/turkey-brine$0.002Developer Utilities
BBQ dry rub scaling calculator by meat weight
POST /cook/bbq-rub-scale$0.002Developer Utilities
Bubble tea tapioca ratio calculator
tea, milk and pearls
POST /cook/bubble-tea-ratio$0.002Developer Utilities
Chemex coffee ratio calculator
grounds and water by cup
POST /cook/chemex-ratio$0.002Developer Utilities
Brewed coffee caffeine estimator
mg from bean weight and brew method
POST /cook/coffee-caffeine-estimate$0.002Developer Utilities
Coffee water from bean weight calculator
brew ratio water volume
POST /cook/coffee-water-from-beans$0.002Developer Utilities
Corned beef cure calculator
salt, sugar & cure by meat weight
POST /cook/corned-beef-cure$0.002Developer Utilities
Pour-over coffee ratio calculator
coffee and water amounts
POST /cook/pourover-ratio$0.002Developer Utilities
Beer Bitterness IBU Estimator
Calculate Hop Bitterness
POST /cook/beer-ibu-estimate$0.002Developer Utilities
Food calorie density calculator
calories per gram free
POST /cook/calorie-density$0.002Developer Utilities
Calories per serving from total calculator
POST /cook/calories-per-serving$0.002Developer Utilities
Cocktail ABV calculator
mixed drink alcohol percentage
POST /cook/cocktail-abv$0.002Developer Utilities
Cocktail batch scaling calculator
any number of servings
POST /cook/cocktail-scale$0.002Developer Utilities
Drinks per guest estimator
total drinks from guests and duration
POST /cook/drinks-per-guest$0.002Developer Utilities
Party punch batch calculator
scale spirit, juice & mixer by servings
POST /cook/punch-scale$0.002Developer Utilities
Wine Bottles for Guests Calculator
POST /cook/wine-bottles-guests$0.002Developer Utilities
Appetizer count per person calculator
pieces from guests and event style
POST /cook/appetizer-per-person$0.002Developer Utilities
Food refrigerator storage time
leftovers, meat and dairy
POST /cook/fridge-storage-time$0.002Developer Utilities
Servings to total weight calculator
portion weight × count
POST /cook/portion-to-weight$0.002Developer Utilities
Cooking start time calculator from serve time and step durations
POST /cook/ready-by-start-time$0.002Developer Utilities
Recipe total cost calculator
quantity × unit price
POST /cook/recipe-cost$0.002Developer Utilities
Side dish quantity per person calculator
guests × portion
POST /cook/side-per-person$0.002Developer Utilities
Bitwise NAND calculator
inverted AND of two integers, free
POST /dev/bitwise-nand$0.002Developer Utilities
Population count (popcount) calculator
Hamming weight of set bits
POST /dev/population-count$0.002Developer Utilities
Arithmetic right shift calculator
signed bit shift
POST /dev/arithmetic-shift-right$0.002Developer Utilities
Bit mask generator
consecutive ones, shift, bin/dec/hex flags
POST /dev/bit-mask-generate$0.002Developer Utilities
Bitmask flags decoder
find active permission and option flags
POST /dev/bitmask-flags-decode$0.002Developer Utilities
Byte array to integer calculator
big/little endian, decimal & hex
POST /dev/bytes-to-integer$0.002Developer Utilities
Hamming Distance Between Integers Calculator
POST /dev/hamming-distance-int$0.002Developer Utilities
Highest set bit position calculator
integer floor log2
POST /dev/highest-set-bit$0.002Developer Utilities
Test bit at position calculator
check whether a bit is set
POST /dev/test-bit$0.002Developer Utilities
Unsigned to signed integer calculator
two's complement reinterpret, free
POST /dev/unsigned-to-signed$0.002Developer Utilities
Balanced ternary calculator
convert integers using −1, 0 and +1 trits
POST /dev/balanced-ternary$0.002Developer Utilities
Bit Length of Integer Calculator
POST /dev/bit-length-integer$0.002Developer Utilities
Double-precision float to bits
IEEE-754 binary64 hex and binary layout
POST /dev/ieee754-double-bits$0.002Developer Utilities
Morton Code Decoder
Convert a Z-order Index to X and Y
POST /dev/morton-decode$0.002Developer Utilities
RGB565 color packer
convert 8-bit RGB to 16-bit color
POST /dev/rgb565-pack$0.002Developer Utilities
Saturating integer add calculator
clamp sum at bit width
POST /dev/saturating-add$0.002Developer Utilities
Fractional base converter
convert 0.xxx between bases 2–16
POST /dev/base-fraction-convert$0.002Developer Utilities
CIDR usable hosts calculator
IPv4 total and usable addresses
POST /dev/cidr-host-count$0.002Developer Utilities
CIDR prefix to subnet mask converter
mask, wildcard and address count
POST /dev/cidr-to-netmask$0.002Developer Utilities
Integer parity checker
even or odd set-bit count
POST /dev/integer-parity$0.002Developer Utilities
IPv4 address class calculator
class A B C D E from leading bits
POST /dev/ipv4-class$0.002Developer Utilities
IPv4 to hexadecimal converter
binary by octet
POST /dev/ipv4-to-hex$0.002Developer Utilities
LEB128 Varint Decoder
Decode Unsigned Byte Sequences
POST /dev/leb128-decode$0.002Developer Utilities
Fast modular exponentiation calculator
base^exp mod m (BigInt)
POST /dev/modular-exponentiation$0.002Developer Utilities
Prefix length to address count calculator
IPv4 and IPv6
POST /dev/cidr-count-addresses$0.002Developer Utilities
IP range to CIDR calculator
minimal CIDR blocks from start–end
POST /dev/ip-range-to-cidr$0.002Developer Utilities
IPv4-mapped IPv6 converter
mapped and compatible forms
POST /dev/ipv4-mapped-ipv6$0.002Developer Utilities
IPv6 address expander
full eight-group form free
POST /dev/ipv6-expand$0.002Developer Utilities
IPv6 prefix checker
test whether an address is in a CIDR range
POST /dev/ipv6-in-prefix$0.002Developer Utilities
Next or previous IP address calculator
IPv4 rollover
POST /dev/next-ip$0.002Developer Utilities
Complexity crossover point calculator
Big-O break-even n
POST /dev/big-o-crossover$0.002Developer Utilities
Data rate unit converter
Mbps, MB/s, binary & decimal, free
POST /dev/data-rate-convert$0.002Developer Utilities
IP address version detector
validate IPv4 and IPv6
POST /dev/ip-version-detect$0.002Developer Utilities
Linear Search Average Comparisons Calculator
POST /dev/linear-search-avg$0.002