Free · Private · Open source
Chart Studio
Draw a full astrology chart for anyone, compare two people, follow today's transits or find your next Solar and Lunar Return. Then let the interpreter explain what it all means, placement by placement.
Six chart types
Natal, synastry, transits, composite, Solar Return and Lunar Return.
Clean data
Signs, degrees, houses, aspects, elements and Moon phase as JSON, plus a text report and AI-ready context.
Your look
Modern or classic wheels, three themes, ten languages, wheel-only output.
Pick your points
Choose planets, nodes, angles, Chiron, Lilith and the main asteroids.
The interpreter
A plain-language reading of every placement, with tarot correspondences, plus an optional deep reading by Claude.
Relationship score
Compare two people with a synastry score and its breakdown.
Build a chart
For developers
The Saturn Studio Python library
Everything on this page runs on Saturn Studio, our open-source Python library built on Kerykeion. Give it birth details and get charts, data, reports and scores back. It works fully offline with latitude, longitude and a time zone, and can look up cities online when you want it to.
pip install "git+https://github.com/eltesla205art/saturn-chart-service"from saturnstudio import Person, Studio
me = Person("Andre", "1990-05-15", "14:30",
lat=28.0836, lon=-80.6081, tz="America/New_York")
partner = Person("Sam", "1992-11-03", "08:05",
lat=40.7128, lon=-74.0060, tz="America/New_York")
studio = Studio(style="modern", theme="dark", language="EN")
chart = studio.natal(me)
chart.save_svg("natal.svg") # SVG chart
chart.to_json() # positions, houses, aspects, elements, Moon phase
chart.report() # plain-text report
chart.context() # compact context for AI prompts
chart.reading_markdown() # built-in interpretation with tarot
studio.synastry(me, partner).score # relationship score
studio.solar_return(me, 2026) # also: transit, composite, lunar_return- Saturn Studio on GitHubSource, examples, tests and the HTTP API. AGPL-3.0.Open (opens in a new tab)
- KerykeionThe astrology engine by Giacomo Battaglia that does the astronomy and drawing.Open (opens in a new tab)
- AsteriaAlamahant's open-source astrology app, whose AI prompt design and tarot tables shaped our interpreter.Open (opens in a new tab)
Where Is Saturn? provides astrology-based educational and reflective content. Astrology is not scientifically established as a method for predicting personality or future events. Results should not replace medical, legal, financial, or mental-health advice. The relationship score is an astrological index, not a prediction about any relationship.