What is a JSON generator?

A JSON generator produces JSON files with a configurable number of records. The structure is an array of objects with placeholder fields – ideal for tests without real data.

dummyfiles.dev provides such a generator: set the number of entries (1 to 100,000), download or call the API. No registration, no API keys.

JSON generator features

Records: 1 to 100,000.

Structure: JSON array of objects (e.g. id, name, value).

Format: Valid JSON, UTF-8.

API: GET with parameter for the number of entries.

Use cases

• Test API clients and consumers
• Verify pagination and lazy loading
• Test frontends with large data sets
• Automated tests/pipelines: repeatable mock data

Highlights

• Up to 100,000 records
• No registration
• GET API
• Optional filename

FAQ

How do I use the JSON generator?

Homepage, “JSON” tab: set number of records, click “Create file”. Or call the API.

Can I customize the structure?

The structure is predefined. For custom schemas, use your own mock.

Is this suitable for unit tests?

Yes. Same parameters return reproducible JSON data.

Do I need an API key?

No.

More generators

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