JSON Stringify
Use JSON Stringify to convert JavaScript objects, arrays, or values into valid JSON strings. Useful for storage, API payloads, or debugging frontend data serialization.
Use JSON Stringify to convert JavaScript objects, arrays, or values into valid JSON strings. Useful for storage, API payloads, or debugging frontend data serialization.
The JSON Stringify tool helps developers and data analysts quickly convert JavaScript-style objects and arrays into valid JSON strings. This is useful for logging, transmitting data over APIs, storing structured data, and debugging complex nested structures.
Built with simplicity and privacy in mind, all operations happen inside your browser. Your data is never uploaded to any server.
This tool parses your input with the strict JSON parser and then serializes it again using the indentation you choose: minified, two spaces or four spaces. Because the input must already be valid JSON, double quotes, no trailing commas and no comments are required. The output is a JSON text, not a quoted string literal, so it does not add outer quotes or escape inner quotes the way calling JSON.stringify on an existing string would. Minified output removes every unnecessary space and newline, which reduces the size of a payload, while indented output is easier for people to read.
Round-tripping through parse and stringify normalizes the data in a few predictable ways. Duplicate keys collapse, and the last one wins. Number text is rewritten, so 1.0 becomes 1 and 1e3 becomes 1000. Integers larger than 9007199254740991 lose precision, because they are held as double-precision floats. Keys that look like whole numbers, such as 10 and 2, are reordered ascending ahead of other keys, because JavaScript objects order integer-like keys first. Escape sequences such as \u00e9 are written back as the actual character. Functions and circular references cannot occur in pasted text.
It converts JavaScript values (objects or arrays) into a JSON-formatted string that can be saved or transmitted over a network.
It accepts valid JSON objects or arrays like {"name":"Utkarsh"} or [1,2,3]. It does not support functions or circular references.
No. All processing happens in your browser using JavaScript. Your input is never uploaded or stored.
Yes. Use the dropdown to choose minified (no spaces), 2-space or 4-space indentation.
Yes! Click the Download .txt button and save the output as a text file for easy reuse.
The text is parsed into numbers and written back in canonical form, so 1.0 becomes 1 and 1e3 becomes 1000. Integers beyond 9007199254740991 may also lose their last digits.
No. The result is ordinary JSON text with the spacing you selected. If you need it wrapped as a string value, with escaped quotes, apply a JSON escape step after copying it.