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Random Birthday Generator

The Random Birthday Generator creates a random date of birth between any two dates. By default it picks birthdays between 1970 and 2010 (adults of all ages); change the start and end date to target an age range, and choose a format such as MM/DD/YYYY or YYYY-MM-DD. No sign-up, nothing stored.

Random Birthday Generator

Press Generate for your result.

How the Random Birthday Generator works

  1. 1

    Set your options

    Set your options, or just use the sensible defaults.

  2. 2

    Generate

    Press Generate to get a random birthday instantly, powered by crypto-grade randomness.

  3. 3

    Copy & use

    Copy your result with one tap. Everything runs locally, nothing is stored or sent anywhere.

What is the Random Birthday Generator?

The Random Birthday Generator is a free online tool that produces random birthdays with no predictable pattern. It uses your browser's cryptographically-strong randomness, so every result is fair and independent, ideal for test profiles, games and placeholder data.

The Random Birthday Generator creates a random date of birth between any two dates. By default it picks birthdays between 1970 and 2010 (adults of all ages); change the start and end date to target an age range, and choose a format such as MM/DD/YYYY or YYYY-MM-DD. No sign-up, nothing stored.

The birthday paradox

In a group of just 23 people there is about a 50% chance that two share a birthday. Generate 23 random birthdays and see if you get a match. It happens more often than most people expect.

Ways to use the Random Birthday Generator

The Random Birthday Generator produces random birthdays instantly, which is surprisingly handy for testing, games and planning alike.

Testing and QA

Developers generate random random birthdays to test booking flows, age checks, filters and reports, surfacing edge cases that fixed values would hide.

Games and prompts

Use random random birthdays for history quizzes, 'what happened on this random birthday' challenges and creative writing prompts.

Planning and decisions

Pick a random random birthday to schedule a surprise, plan a themed event, or simply break a scheduling deadlock.

Learning and practice

Students use random random birthdays to practise calendar maths, conversions and calculations in a hands-on way.

Tips

Generate a batch of random birthdays at once when you need a set for testing or a quiz, then copy or download them together.

Random Birthday Generator, FAQ

How do I generate a birthday for a certain age?
Set the start and end dates to match the age range. For someone aged 18 to 30 today, pick a start date 30 years ago and an end date 18 years ago.
Which date formats are available?
Long format (October 17, 1994), ISO (1994-10-17), US (10/17/1994) and European (17/10/1994).
What is a random birthday useful for?
Fictional characters, role-play, test data, giveaways ("closest birthday wins") and party games like birthday paradox demos.
Is it a real person's birthday?
No. Dates are generated at random and are not linked to any real person.
How do I use the Random Birthday Generator?
Set your options if you like, then press Generate. You'll get a random birthday instantly, ready to copy. Sensible defaults mean you can also just hit Generate.
Is the Random Birthday Generator really random?
Yes. Where available, Toolssy uses the browser's Web Crypto API, far stronger than a basic Math.random() call, so your random birthdays are genuinely unpredictable and unbiased.
Is the Random Birthday Generator free, and do you store my results?
It's completely free with no account and no limits, and no, nothing is stored. Everything runs locally in your browser, so your inputs and results are never sent to a server or logged.

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