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Stringify JSON
Convert JavaScript objects to JSON string
By Craftisle Team
About Stringify JSON — Free Online Tool
Convert JavaScript objects to JSON string. Supports custom indent size. Useful for preparing data for APIs, localStorage, and data export. Handles JavaScript-specific syntax (quotes, functions, etc.) are removed.
How to Use Stringify JSON — Step by Step
- Enter JavaScript object
Type or paste a JavaScript object (e.g., {name: 'Alice', age: 25}).
- Set indent
Choose indent size (2 or 4 spaces, or tab).
- Stringify
Click Stringify. The JSON string appears.
- Copy
Copy the JSON string for use in code.
Use Cases for Stringify JSON
API requests
Convert JS objects to JSON for API requests.
localStorage
Convert data to JSON for storing in localStorage.
Data export
Convert JS data to JSON for export.
FAQ — Stringify JSON Free Online Tool
What input format is supported?
Valid JavaScript object syntax. Keys can be unquoted (JS style) or quoted (JSON style).
Does it handle functions or undefined?
Functions and undefined values are removed (replaced with null). This matches JSON.stringify() behavior.