Mock JSON Data Generator
Generate JSON arrays of fake data — sequential IDs, UUIDs, names, emails, random numbers, and dates — from your own schema
Builds arrays of realistic dummy JSON records that match a schema you define, ready to drop into frontend API mocks or database tests. Define your fields once and generate as many rows as you need, instantly.
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🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
How to use
- Define your JSON field names and pick a data type for each: sequential ID, UUID, name, email, random number, date, boolean, or a custom enum list.
- Enter the number of rows you want to generate.
- Hit Generate, review the JSON output, then copy it to your clipboard or save it as a file.
FAQ
- How does the custom enum type work?
- Enter a comma-separated list of values (for example: admin, user, guest) and each generated row is randomly assigned one of them.
- Does the dummy data — names, emails, and so on — change every time I generate it?
- Yes, each time you click the generate button, the values are randomly recombined from scratch, so you'll get a different result every time. If you need to reproduce the exact same output later, save the generated JSON somewhere yourself — there's currently no option to fix a random seed for repeatable output.
- Does the dummy data — names, emails, and so on — change every time I generate it?
- Yes, each time you click the generate button, the values are randomly recombined from scratch, so you'll get a different result every time. If you need to reproduce the exact same output later, save the generated JSON somewhere yourself — there's currently no option to fix a random seed for repeatable output.