JSON to string in every language
The one-liner for each major language and environment.
JavaScript / Node.js
JSON.stringify(obj) — built-in, no import needed. Add a second argument for a replacer and a third for indentation: JSON.stringify(obj, null, 2). To embed in another JSON value, call JSON.stringify(JSON.stringify(obj)).
Python
import json; s = json.dumps(obj). Use json.dumps(obj, indent=2) for pretty output. For embedding: json.dumps(json.dumps(obj)). The ensure_ascii=False flag preserves Unicode characters.
Java
With Jackson: new ObjectMapper().writeValueAsString(obj). With Gson: new Gson().toJson(obj). Both produce a compact JSON string. Use ObjectMapper().writerWithDefaultPrettyPrinter() for indented output.
Other languages
PHP: json_encode($obj). Ruby: obj.to_json or JSON.generate(obj). Go: json.Marshal(obj). C#: JsonSerializer.Serialize(obj) or JsonConvert.SerializeObject(obj).
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Common questions about converting JSON to a string.
How do I convert JSON to a string?
Paste your JSON object or array into the converter above and click Convert. The output is the escaped string equivalent — identical to what JSON.stringify() produces in JavaScript. Copy it directly into your code or use it to embed JSON inside another JSON value.
What is the difference between JSON and a JSON string?
JSON is a data format — {"name": "Alice"}. A JSON string is the serialised text representation — "{\"name\":\"Alice\"}" — produced by JSON.stringify() in JavaScript or json.dumps() in Python. The JSON string can be stored in a text field, passed as an HTTP body, or embedded inside another JSON value.
How do I convert JSON to a string in JavaScript?
Use JSON.stringify(obj) — built-in, no library needed. For pretty output: JSON.stringify(obj, null, 2). To embed inside another JSON string: JSON.stringify(JSON.stringify(obj)). The result is a string with backslash-escaped quotes.
How do I convert JSON to a string in Python?
Use json.dumps() from the built-in json module: import json; s = json.dumps({"name": "Alice"}). Use indent=2 for readable output. Add ensure_ascii=False to keep Unicode characters as-is instead of escaping them to \uXXXX sequences.
