Open Human Design — Private, Self-Hosted Chart Calculator

A free, open-source Human Design chart calculator that runs entirely in your browser. No account. No tracking. No backend. No name asked. Your birth data never leaves your device.

Why you'll like it

• Private by design. The Human Design algorithm needs your birth date, time, and place — never your name — so we don't ask for it. No Google Fonts, no analytics, no server. Charts are computed in your browser and saved only on your device.
• Complete, not paywalled. Every layer competitors charge for is free here: full bodygraph, type, strategy, authority, profile, definition, variable/PHS, incarnation cross, transits, connection charts, and team analysis.
• Self-hosted and offline. One static site or a one-click Cloudron app. Once loaded, it works without a network (place autocomplete optional; manual UTC offset available).

Features

• Full bodygraph — canonical layout, Design (red) and Personality (black) columns, traditional center colors, candy-striped dual activations, tap any gate for detail.
• Type, Strategy, Authority, Profile, Definition — plain-language first, jargon second.
• Variable / PHS — determination, environment, motivation, perspective, with color, tone, and cognition.
• Planetary activations — all 26, with line/color/tone/base substructure.
• Incarnation Cross — canonical naming plus the Gene Keys activation sequence.
• Transits — any date overlaid on your chart, with channel completions.
• Connection charts — electromagnetic / companionship / compromise / dominance.
• Team analysis — Penta roles and group dynamics.
• Birth-time reliability check — see whether a ±15 minute error would change your chart.
• Light and dark mode, saved charts, shareable links.

Accuracy

Planetary positions from astronomy-engine (±1 arcminute; a gate spans 5.625°, so far beyond chart-flipping precision). Design calculated at exactly 88° of solar arc before birth. Timezones resolved from historical IANA data at the birth moment. Core readouts match Swiss-Ephemeris-grade references for modern dates.

License

MIT. Open source. No AGPL components. The Human Design system's structure is uncopyrightable fact; Ra Uru Hu's original prose is Jovian Archive's IP and is not used.