A JSON response is easier to inspect when its fields sit on separate lines. Formatting should change the layout, though, not the values. That distinction matters when an order number is longer than a spreadsheet or JavaScript can represent exactly.
JSON Formatter & Validator accepts a JSON document and returns a readable or compact version. It preserves number token spelling, distinguishes an empty object from an empty array, and stops when duplicate object keys make the document ambiguous.
Start with a small response
Paste {"city":"Lahore","order":9007199254740993,"extra":{}} and choose Pretty print with two spaces. The order value should still read 9007199254740993. The extra field should remain {}, rather than becoming [].
Four spaces give a wider layout. Compact output removes unnecessary whitespace and is useful when the next application expects a single line. Sorting object keys can help compare configuration files, but it does not sort the items inside an array.
A trailing comma, an unfinished string or a missing closing bracket produces an error. Fix the underlying document before copying anything. The editor does not execute text that happens to contain HTML or a script tag.
What formatting cannot establish
A valid document can still contain the wrong price, a misspelled field or an unexpected data type. Validation here checks JSON structure. It does not know the schema your payment gateway or application expects.
The tool handles small documents, with a 16,000 byte input limit, a bounded nesting depth and a node limit. Divide a large export into meaningful sections instead of pasting an entire database dump.
Keep the original response beside the formatted copy until your receiving application accepts it. Avoid sharing live credentials inside a configuration file, even when you only want to adjust its indentation.