Format JSON
Use the tool immediately, then come back to the guide for troubleshooting notes.
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How JSON Formatting Works
JSON formatting parses valid JSON and serializes the same values with consistent indentation and line breaks. It improves reviewability, but it does not repair invalid syntax or verify an API schema.
What a JSON formatter changes
A formatter parses valid JSON into data and serializes that data again with consistent indentation, line breaks, and spacing. Those whitespace changes make nested objects and arrays easier to review without changing string, number, boolean, null, array, or object values.
ScriptZip can also sort object keys when that option is selected. Sorting changes the displayed key order, so leave it off when order matters to a review, diff, or downstream convention.
Reproduce a compact-to-readable formatting example
Paste the compact input into JSON Formatter, keep a two-space indent, leave key sorting off, and select Format JSON. The output contains the same values in a structure that is easier to scan during API, webhook, log, and test-fixture work.
{"service":"billing","ok":true,"items":[{"id":17,"qty":2}]}The input is already valid JSON; formatting changes presentation rather than repairing data.
{
"service": "billing",
"ok": true,
"items": [
{
"id": 17,
"qty": 2
}
]
}Strings, numbers, booleans, arrays, and objects retain their values.
Format after validation when syntax is uncertain
Formatting requires valid JSON. Use JSON Validator first when an API payload contains malformed quotes, missing commas, trailing commas, or unmatched brackets. Its parser feedback identifies the first syntax failure; correct that error and validate again before formatting.
| Question | Use | Result |
|---|---|---|
| Is this text valid JSON? | JSON Validator | A valid result or the parser error with its line and column. |
| Can I make valid JSON easier to read? | JSON Formatter | Consistent indentation and optional object-key sorting. |
| Does this payload meet an API schema? | The API schema or application tests | ScriptZip checks syntax, not required fields or business rules. |
Troubleshoot formatting errors without changing the data
Unexpected token or delimiter
Inspect the reported position and the token immediately before it. A missing comma or quote often causes the parser to fail on the next property.
Single-quoted strings
Standard JSON requires double quotes around property names and string values. JavaScript object literal syntax is not automatically valid JSON.
Trailing commas
Remove the comma after the final object member or array item. Standard JSON does not allow trailing commas.
Unexpected key order
Turn off Sort object keys when the original order is useful for review. Sorting does not change values, but it can make a source diff larger.
Formatting does not repair malformed JSON or confirm that the data matches an API contract. Keep a copy of the source when exact ordering or whitespace is significant to another system.
Related tools
Fix common JSON parse errors
Find and fix invalid quotes, commas, and brackets with reproducible JSON examples.
Validate JSON syntax before formatting
Check JSON syntax and find common structure errors before using data in apps or APIs.
Format valid JSON online
Format and beautify JSON with clean indentation for easier reading, debugging, and sharing.
JSON to CSV
Convert JSON arrays or structured data into CSV output for spreadsheets and reports.
JSON Formatter vs JSON Validator
Choose JSON formatting for readable output or validation for syntax feedback.
Markdown Preview
Preview Markdown as rendered content before using it in docs, blogs, or project notes.