JSON Stringify

JSON.stringify() is a fundamental JavaScript method that converts JavaScript objects, arrays, and primitive values into JSON strings. Our JSON stringify tool provides a user-friendly interface to this powerful function, allowing you to convert complex JavaScript objects into valid JSON format with customizable spacing and indentation. This is essential for serializing data to send to APIs or store in databases.

Converting Objects to JSON

When building web applications, you often need to convert JavaScript objects into JSON strings for various purposes: sending data to REST APIs, storing data in localStorage, transmitting data over WebSockets, or saving configuration to files. Our stringify tool handles this conversion automatically, transforming your JavaScript objects into properly formatted JSON that can be safely transmitted and parsed by other systems.

Customizable Spacing

The spacing parameter controls the indentation of the output JSON string. Setting spacing to 0 creates compact, minified JSON without any whitespace, perfect for production environments where file size matters. Using 2 or 4 spaces creates beautifully formatted JSON that's easy to read and debug during development. Our tool lets you switch between these options instantly to see the difference in output.

Handling Edge Cases

JSON.stringify() has important limitations to be aware of. It cannot handle circular references (objects that reference themselves), and will throw an error if encountered. Functions, undefined values, and symbols are omitted from the output. Dates are converted to ISO 8601 strings. Our tool clearly displays these errors when they occur, helping you understand why certain objects can't be stringified and how to fix the issue.