DreamDecrypt Toolkit

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.

No account required for core usage
Runs in the browser with lightweight local preferences
Focused scope: timing, caffeine, napping, sleep debt, jet lag, chronotype, breathing, and background sound
Core Tools

Sleep and wind-down utilities

Use the tool that matches the exact job you need to do right now.

The Science Behind the Tools

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