Create test data for a signup form or age-gated product.
Free private birthday utility
Random Birthday Generator
Generate realistic calendar dates for planning, writing, testing, and classroom activities—then copy or export the results in the format you need.
Private local utility
Random Birthday Generator
Create valid random birth dates, see exact ages, or compare two ages without sending personal details anywhere.
Generated birthdays
Valid calendar dates, with repeats avoided whenever the selected range allows.
Choose a range and generate your first set of birthdays.
Runs entirely in your browser. Dates are not saved, uploaded, or used to identify real people.
Try these ideas
Useful whenever you need sample birthdays
Give fictional characters believable birthdays and exact ages.
Prepare classroom exercises about dates, years, and age differences.
Build sample guest lists without using anyone's personal information.
Generate a batch in one date format and export it as CSV.
Compare two precise ages down to years, months, and days.
Get more useful results
- Use age range when the current age matters more than the birth year.
- Use birth year for datasets that need a specific historical period.
- Choose ISO format for software and spreadsheets.
- Treat every result as fictional sample data, not proof of identity.
Questions