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Free Online JSON Formatter

Parse JSON and indent it for readability.

Your input stays on this device. Processing is bounded; regex runs in a worker with a two-second timeout.

Result



How to use JSON Formatter
Parse JSON and indent it for readability. JavaScript JSON parsing can round integers larger than 2^53−1. Store exact identifiers as strings. Formatting checks syntax, not a domain-specific schema.
  1. Set Input.
  2. Run the tool, review the result and its stated limitations, then copy or download if needed.
Example & practical use
Parse JSON and indent it for readability. The example below demonstrates Input.
Example input:
{
  "text": "{\"b\":2,\"a\":1}"
}
Expected result (relevant fields):
"{\n  \"b\": 2,\n  \"a\": 1\n}"
Features & result limitations
JavaScript JSON parsing can round integers larger than 2^53−1. Store exact identifiers as strings. Formatting checks syntax, not a domain-specific schema.
Frequently asked questions
What inputs does JSON Formatter accept?
Input
How should I interpret the JSON Formatter result?
JavaScript JSON parsing can round integers larger than 2^53−1. Store exact identifiers as strings. Formatting checks syntax, not a domain-specific schema.
Where does JSON Formatter process my data?
Inputs are processed locally in your browser. Submitted text is not sent to external services. A successful-run event increments an aggregate tool counter without your input.
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