JSON Generator
Generate random JSON data - with configurable schema
Templates
Result
What is a JSON Generator?
A JSON Generator creates random JSON data based on a schema that you define yourself. You specify which fields your JSON object should have and what data type each field is - for example string, number, UUID, email, or date. The generator then produces realistic test data that you can use for API testing, database seeding, or frontend prototyping. You can generate single objects or arrays with up to 100 entries, making it a versatile tool for any development workflow.
How do I use the JSON Generator?
Define your schema in the editor above: Give each field a name and select the data type from the list. Use "+ Add Field" to extend the schema and the X button to remove fields. Set the desired count and click "Generate". The result appears formatted in the output field and can be copied to your clipboard with a single click. Supported types include UUID, email, name, IP address, URL, date, and Lorem Ipsum among others.
Why generate JSON test data online?
Creating test data manually is time-consuming and error-prone. Our generator instantly delivers realistic data with correct formats. Ideal for developers testing APIs, populating database tables, or developing UI components with sample data. Everything runs directly in your browser - no registration, no upload, no data transmission. Your schema and generated data stay completely private on your device.
More Tools
Also try our JSON Formatter for the generated data, the XML Generator for XML test data, or the JSON to CSV Converter to export to spreadsheets.