Generator
Generate a self-contained, dependency-free HTML countdown banner for any page. Target date, timezone, theme, one-shot or weekly-recurring mode, live in-browser rendering.
live-countdown-banner-generatorHealth
Convert a daily calorie target into grams of carbohydrate, protein and fat. Pick a preset split — balanced (50/30/20), low-carb (35/40/25), keto (10/20/70) or high-protein (40/35/25) — or define your own percentages.
macro-calculatorGames
The classic Magic 8 Ball. Ask any yes-or-no question, shake, and get one of 20 traditional answers (yes / no / uncertain). Classic English phrases or localized translations.
magic-8-ballMath & Numbers
Convert liters to US cups with configurable decimal precision
liter-to-cupMath & Numbers
Convert liters to US liquid pints with configurable decimal precision
liter-to-pintMath & Numbers
Convert liters to US liquid quarts with configurable decimal precision
liter-to-quartMath & Numbers
Convert liters to US liquid gallons with configurable decimal precision
liter-to-gallonText Processing
Decode leetspeak (1337) to plain text and score how plausibly leet an input is — for password-policy bypass screening, profanity-filter evasion, and log-noise filtering.
leetspeak-decoder-detectorAstronomy
Convert between light-years (ly), parsecs (pc), astronomical units (AU), kilometers and meters using IAU-defined constants, with a parallax-angle → distance helper.
light-year-and-astronomical-unit-converterMath & Numbers
Compute kinetic energy, mass, or velocity from the other two, with momentum and km/h conversion
kinetic-energy-calculatorMath & Numbers
Compute the current-limiting resistor for LEDs in series with power, nearest standard value and wattage rating
led-resistor-calculatorText Processing
Convert text to and from leet speak (1337). Encode with Basic, Full, or Caps styles, or decode leet back to plain text.
leet-speak-converter