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Random JSON Generator

Click Run to generate (uses default if input is empty). Use Sample then Run to see an example.

Output

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Random JSON Generator — Create Test Data Online Free

Generate random JSON objects for testing. Enter size (1–20) for number of keys, or leave empty for 5.

Generate random JSON objects with mixed types. Client-side only.

Paste or type your input into the editor on the left panel.
Results update automatically while you type. You can also press Ctrl+Enter to force a refresh.
View the result in the output panel on the right with full syntax highlighting.
Use Copy or Download to export the result.
Drag and drop .json or .txt files directly into the editor.

{"id": 1, "name": "value_abc", ...}

100% client-side — your data never leaves your browser. No server processing, no data collection.
No sign-up required — start using the tool instantly with no registration or installation.
Keyboard shortcuts — press Ctrl+Enter to run, ? for shortcuts list, Ctrl+B to toggle sidebar.
Persistent state — your input is automatically saved across sessions using local storage.
IDE-style interface — Monaco Editor (the engine behind VS Code) with syntax highlighting and error detection.
Multi-format conversion — convert between JSON, XML, CSV, and YAML without switching tools.

It controls how many top-level keys the generated object has (1–20).

Paste your data into the editor above for instant processing. Use Ctrl+Enter anytime to re-run quickly.