Tools to decode your sleep
Eight browser-based utilities to understand and improve your sleep. Each tool is built on sleep science research—no signup, no clutter.
Sleep and wind-down utilities
Use the tool that matches the exact job you need to do right now.
Sleep Cycle Calculator
Plan bedtimes and wake-up times based on natural 90-minute sleep cycles.
Caffeine Cutoff Calculator
Find the optimal time to stop caffeine based on its half-life for better sleep.
Power Nap Timer
Take the perfect nap with science-based timing for maximum refreshment.
Sleep Debt Calculator
Track your weekly sleep deficit and get a personalized recovery plan.
Jet Lag Planner
Get a personalized light exposure schedule to adjust to new time zones faster.
Chronotype Quiz
Discover your sleep chronotype and ideal daily schedule in 2 minutes.
Breathing Exercise
Guided breathing patterns to calm your nervous system before sleep.
White Noise & Sleep Sounds
Steady background sounds to mask disruptive noise and improve sleep quality.
Every tool is grounded in sleep research
DreamDecrypt tools translate peer-reviewed sleep science into practical utilities. From circadian rhythm research to caffeine pharmacokinetics, each feature is based on established scientific principles.
- • Sleep cycles: Based on the 90-minute ultradian rhythm research by Nathaniel Kleitman
- • Caffeine half-life: Uses 5-6 hour elimination pharmacokinetics from clinical studies
- • Chronotypes: Based on circadian phenotype research and the Munich Chronotype Questionnaire
- • Jet lag: Applies phase response curve (PRC) principles for circadian adjustment
Start with the tool that solves the immediate problem, then leave when you are done.
Open Sleep Calculator