Data Generators & UtilitiesType library and limits are placeholders.Types · sample

Fields4

RecordsMax 1000 (sample)

Output

Define fields and a count, then click Generate

Mock / Test Data

JSON Mock Data Generator

Custom fields & types · Batch 1–1000 · Export JSON / CSV · Runs locally

🔒Processed locally in your browser — never uploaded or stored

Everything runs in your browser — inputs and results never reach a server.

No signup, no install, works offline.

Fully free, no popups, no tracking.

Generate Fake JSON Data｜Custom Fields & Types｜Batch 1–1000 Records｜Export JSON / CSV｜Runs Locally — No Upload

Names, addresses, phones, emails, dates, enums and more (sample list).

Generates in frames with progress, 1–1000 records (limit is a placeholder).

Copy or download JSON, or export CSV for tests and APIs.

Output as a JSON array or line-delimited NDJSON.

Field setup and generation stay in your browser.