The toolkitText & code
Make JSON readable, check its syntax, or minify it. Number literals and the order of keys stay intact.
USEFUL DETAILS
Paste strict JSON and choose Format or Minify. Syntax errors appear with the browser’s error message. Formatting preserves the original number literals, duplicate keys and their order; it does not repair invalid JSON or convert JavaScript objects into JSON.
Input
{"id":9007199254740993,"active":true}Result
{
"id": 9007199254740993,
"active": true
}This formatter preserves the original number literals rather than parsing and reserialising the data. A large integer keeps its written digits, and key order and duplicate keys are retained. A program that later reads the JSON may still have its own numeric precision limits.
JSON requires double-quoted property names and strings. Comments, trailing commas, single-quoted strings and values such as undefined are invalid. The validator reports syntax errors; it does not automatically repair input or validate your data against a JSON Schema.