What data shapes can I generate?

Three templates are available — users (with name, email, role, city), products (with SKU, price, stock, rating) and blog posts (with title, author, views, slug). Each record uses realistic randomized values.

Are the IDs and UUIDs valid?

Yes. Numeric IDs increment from 1 and UUIDs are generated with the browser's crypto API, so they are unique and well-formed for use in tests.

Is any data sent to a server?

No. All records are generated in your browser. Nothing is uploaded, so it is safe for prototyping and offline use.

Mock JSON Generator

Generate realistic mock JSON records for users, products and posts.

Realistic JSON test data in one click

Stubbing out an API, seeding a UI, or writing tests? This mock JSON generator produces formatted, realistic records for users, products and blog posts — ready to paste into your code.

Pick a template, choose how many records you want, and decide whether a single record should be wrapped in an array. UUIDs use the browser’s secure crypto API, and the whole thing runs locally so your test data never leaves your machine.