AddressTool.org

Seeded · 1–100 records · 38 countries · CSV and JSON

Synthetic Test Data Generator

Build a fixture you can reproduce. Choose a country, a record count, a seed, and the fields you need. The same inputs always produce the same records, so a failing test can be replayed by anyone on the team.

  • Free
  • No signup
  • Runs locally
Fields

Same country, seed, count, and fields produce byte-identical output.

Preview (10 of 10)

indexnameemailuuidstreetunitcityregionpostalcountryfullAddress
1Riley Jensenriley.jensen1@example.testa6b63046-3b8d-4d63-a170-ad439bb1b8fb1697 Maple Avenue—New YorkNY10001United States1697 Maple Avenue, New York, NY 10001, United States
2Cameron Mensahcameron.mensah2@example.test2b322353-56e4-4d52-b01b-57b1a4c9be048694 Lakeview DriveApt / Suite 21Los AngelesCA90001United States8694 Lakeview Drive, Apt / Suite 21, Los Angeles, CA 90001, United States
3Harper Singhharper.singh3@example.testb0ae1660-703b-4d42-bfc7-011fade0c40d6791 Pine Street—ChicagoIL60601United States6791 Pine Street, Chicago, IL 60601, United States
4Rowan Diazrowan.diaz4@example.test352a096d-8a91-4e32-8e73-aa8db6f7c9174889 Cedar LaneApt / Suite 22HoustonTX77001United States4889 Cedar Lane, Apt / Suite 22, Houston, TX 77001, United States
5Taylor Hayestaylor.hayes5@example.testbaa6fc7a-a4e8-4e22-9d1e-54fcbf0ecf202986 Oak Street—SeattleWA98101United States2986 Oak Street, Seattle, WA 98101, United States
6Jamie Kowalskijamie.kowalski6@example.test3f22ef87-bf3f-4e12-acca-fe6ac825d4291084 Sunset BoulevardApt / Suite 22New YorkNY10001United States1084 Sunset Boulevard, Apt / Suite 22, New York, NY 10001, United States
7Drew Nakamuradrew.nakamura7@example.testc49ee293-d995-4e02-bb76-a8d8d13cda328081 Lakeview Drive—Los AngelesCA90001United States8081 Lakeview Drive, Los Angeles, CA 90001, United States
8Harper Bennettharper.bennett8@example.test4919d5a0-f3ec-4ef1-8a22-5246da53e03b6179 Pine StreetApt / Suite 23ChicagoIL60601United States6179 Pine Street, Apt / Suite 23, Chicago, IL 60601, United States
9Emerson Okaforemerson.okafor9@example.test7ed798e0-6ad8-4ce4-a912-5ed253f98bb24276 Cedar Lane—HoustonTX77001United States4276 Cedar Lane, Houston, TX 77001, United States
10Quinn Bennettquinn.bennett10@example.test03538bed-842f-4cd4-b8be-08405c1091bb2373 Maple AvenueApt / Suite 24SeattleWA98101United States2373 Maple Avenue, Apt / Suite 24, Seattle, WA 98101, United States

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Reproducible by design

No Math.random and no Date.now anywhere in the generator. A seed is the whole contract.

Safe address and email values

Addresses come from the country fixtures and every email uses the reserved .test domain, so nothing can be delivered or mistaken for a real person.

Export what the test needs

Choose fields per record and download CSV or JSON. The CSV quotes commas and escapes embedded quotes.

Synthetic Test Data Generator questions

What does the seed actually control?+
It seeds a small deterministic random generator used for names, birthdays, the address choice, and the UUID. Same seed plus same settings equals identical output, which is what makes a regression fixture usable.
Why are emails always example.test?+
example.test is reserved by RFC 2606 and can never be delivered. Using it means a generated fixture can never send mail to a real person, even by accident.
Why do only some countries get a phone number?+
Only the US and Canada share the NANP range where 555-0100 to 555-0199 is reserved for fiction. Other countries have no equivalent guaranteed-safe range, so the field stays blank rather than inventing a number that might belong to someone.
Is the UUID a real UUID?+
It has the correct version and variant bits, but the randomness comes from the seed, not from a cryptographic source. Use it as a fixture identifier, never as a production key.
Can I generate more than 100 records?+
Not on this page. Larger datasets belong in a script: the same generator is a library function, and keeping the browser output small avoids freezing the tab.
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