Random Birthday Generator
Generate random birth dates constrained by age range, month or zodiac sign — with the age and star sign of every result. Ideal for test data, characters and personas.
Input
Settings
Output
| Date | Birthday | Age | Zodiac |
|---|---|---|---|
| No data yet | |||
Guides
Generate random birth dates that actually make sense: constrain the draw by age range, month or zodiac sign, and every result comes back with its ISO date, a readable form, the person's current age and their star sign.
How to use it
- Choose how many birthdays to generate (1–40).
- Set the age range the person should be today (defaults to 18–80).
- Optionally pin a month (e.g. only September birthdays) or a zodiac sign (e.g. only Scorpios) — or both, when they overlap.
- Hit Pick birthdays.
What is this for?
- Test data — realistic dates of birth for staging databases, sign-up forms and age-gate testing. The age-range control means every generated user is, say, verifiably 18+.
- Characters and personas — give fictional characters or UX personas a birthday consistent with their age, complete with star sign.
- Games and prompts — random dates for birthday-paradox demos, trivia or icebreakers.
How is the age calculated?
Relative to today, precisely: if you ask for ages 20–29, the generated date makes the person that exact age right now — a birthday that hasn't happened yet this year shifts the birth year back accordingly. February 29 is deliberately never generated, so every result is a date that exists in every calendar year.
Can I combine month and zodiac filters?
Yes, when they're compatible — Scorpio + November works (Nov 1–21), Scorpio + January can't exist and the form will tell you before generating.
Are the zodiac signs accurate?
Results use the traditional Western zodiac date ranges (Aries: March 21 – April 19, and so on). Dates on cusp boundaries follow the conventional cutoffs.
Does it work offline / is my data private?
The generator runs entirely in your browser — no AI calls, no server round-trip, nothing stored or sent anywhere.
Need other personal test data? Try the Random Address Generator or the Phone Number Generator.
Use it from code
From 3 credits per callREST API
curl -X POST https://api.iotools.cloud/v1/tool/random-generator/random-birthday \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"entriesCount": "5",
"minAge": "18",
"maxAge": "80",
"month": "any",
"zodiac": "any"
}'Swap in your own key from your account. The tool's fields are the body — no wrapper.
Ask an AI agent
Use the IOTools `random-generator__random-birthday` tool (Random Birthday Generator) on this input:
YOUR_INPUT_HEREPaste this at any agent connected to the IOTools MCP server, then add your input.