What is the Random Birthday Generator?
The Random Birthday Generator creates complete dates of birth for people within an age range you choose, from 0 to 110 years old. By default it produces adults between 18 and 65 — a common range for test profiles and sign-up forms.
Every result shows the date, the age that person would be today and their Western zodiac sign, for example June 14, 1968 (Age 58 · Gemini). Ages are calculated precisely from the full date, so birthdays later in the year are handled correctly. Choose from four formats: Month D, YYYY for readable text, YYYY-MM-DD for ISO and databases, MM/DD/YYYY for the US style and DD/MM/YYYY for the style used in most other countries.
Generate up to 100 birthdays per click and export them as CSV, JSON or TXT. Dates are random, so they do not belong to real people. Everything runs in your browser using the Web Crypto API and nothing is stored. A shareable link keeps your age range and chosen format.
How to use the Random Birthday Generator
- Set the Minimum age and Maximum age (0–110).
- Choose a date Format: Month D, YYYY, YYYY-MM-DD, MM/DD/YYYY or DD/MM/YYYY.
- Set How many? birthdays you need, up to 100.
- Press Generate, then copy or export the list.
Popular uses
- Developers & QA testers — test date pickers, age checks and date formats.
- Writers & role-players — give characters birthdays and star signs.
- Teachers — explore the birthday paradox with a class-sized sample.
- Party planners — run birthday-themed games and icebreakers.
Why use RandNow?
- Instant & unlimited — no sign-up, no daily caps.
- Private by design — results are generated in your browser, not on our servers.
- Export-ready — copy, CSV, JSON and TXT downloads built in.
- Cryptographically random — powered by the Web Crypto API.
Try the birthday paradox
In a group of just 23 people, there is slightly better than a 50% chance that two share a birthday — and with 70 people it is over 99%. Generate 23 birthdays, look for a matching day and month, and repeat a few times; you will be surprised how often a match appears. It is a memorable way to show how probability defies intuition. The more people you add, the faster a shared birthday appears.
Generated dates are for testing, games and fiction only, never for identity documents. Press Generate again for a fresh set — it’s free and unlimited.
Frequently asked questions
Which date formats are available?
Month D, YYYY; YYYY-MM-DD; MM/DD/YYYY and DD/MM/YYYY.
Does it show the age and zodiac sign?
Yes, every birthday includes the current age and the Western zodiac sign.
What age range can I set?
Any range from 0 to 110 years old.
How many birthdays can I generate?
Up to 100 per click, as many times as you like.