Celesti

Celesti isn't just another "horoscope of the day" widget; it's a complete, professional-grade astrological toolset powered by lightning-fast, offline calculations. Whether you're a seasoned professional astrologer or just starting to explore your natal chart, Celesti brings the cosmos to your browser with unparalleled speed and beauty.

For the Modern Enthusiast:

Real-Time World Clock: See a beautiful, dynamic chart of the sky right now, calculated for your exact location.

AI-Powered Horoscope Interpretations: Get insightful, detailed explanations for your planets, aspects, and houses. Understand what it all means.

Real-Time Horoscope Notifications: Get notified of changes in the sky in real-time, and learn what they mean with our AI interpreter.

Lunar & Eclipse Tracker: Instantly find upcoming New/Full Moons and search a 5,000-year database for any solar or lunar eclipse.

For the Professional Astrologer:

High-Precision Ephemeris: Powered by the milnesian.ephem.js library, our calculations are fast, precise, and run entirely offline from a multi-gigabyte installed database.

12+ House Systems: Go beyond Placidus. Select from Whole Sign, Porphyry, Regiomontanus, Koch, Campanus, and more to match your practice.

Full Planet & Asteroid Support: Track all major planets, luminaries, nodes, and key asteroids (Chiron, Ceres, Pallas, Juno, Vesta).

Natal Chart Management: Create, save, and manage an unlimited* library of natal charts for yourself, your friends, family, or clients.

Advanced Timelapse Control: Move through time with our transit calculator. Skip by the second, day, month, or week to see planetary movements unfold.

Fast, Private, and Offline-First

Celesti is different. All your personal data—especially your natal charts—is stored only on your computer. Nothing is ever uploaded to a server.

Our "lightning-fast" calculations are possible because the entire NASA JPL ephemeris and city database is installed locally on your machine. Your charts are 100% private and load instantly.

Free Version:

Real-Time World Clock
Your Personal Natal Chart + 1 extra saved chart
Daily limits on AI interpretations, eclipse/phase searches, and time skips.
Real time astrology notifications for Sun, Moon and Planets.

Celesti Pro (Paid Upgrade):

Unlimited Natal Chart saving
Unlimited AI Interpretations
Unlimited Eclipse/Phase searches and Timelapse skips
Unlock all 12+ House Systems
Customize Orbs & Planets
All future feature updates are included!
Real time astrology notifications for Sun, Moon and Planets and asteroids!

Install Celesti today and turn your browser into a true window to the cosmos.