About Birthdex

Birthdex is a free reference for what your birth date means. Enter a birthday and it gathers the zodiac sign, birthstone and birth flower into one clean profile, then lets you save a shareable card. No ads, no sign-up, no tracking.

Why we built it

The facts about a birthday are scattered across jewellery shops, astrology portals and gardening blogs, most of them cluttered with ads or trying to sell you something. We wanted one calm, fast place that just answers the question and lets you move on. Everything is worked out in your browser from static reference data, so it loads instantly and works offline.

How we treat the content

The zodiac dates and the day-of-week calculation are astronomical facts. Birthstones and birth flowers follow the widely used modern and traditional lists, with older alternatives noted where they exist. The personality and compatibility notes are a cultural tradition, offered for interest and fun, never as prediction, advice or anything medical. We keep the astrology tone light and traditional on purpose.

Open data

Because the data is useful on its own, we publish it as a free JSON API anyone can build on, and offer an embeddable widget for your own site. Both are free to use.

Get in touch

Spotted an error or have a suggestion? We would love to hear it. See the contact page.