JSON Formatter
Format, minify, and inspect JSON payloads. Free online developer tool for fast browser-based work.
What is this tool?
JSON Formatter turns compact or hard-to-read JSON into an indented structure that is easier to inspect, compare and paste into API notes. It is useful when a response parses but the nesting makes the real issue difficult to see.
How to use
- Paste a JSON object, array or API response into the editor.
- Choose format or minify depending on whether you need readability or compact output.
- Review nested fields before copying the cleaned payload into a ticket, fixture or documentation example.
Practical example
A compact JSON object becomes easier to inspect after formatting.
Input: {"name":"Ana","active":true}
Output:
{
"name": "Ana",
"active": true
}API
For automated pipelines, use the API when you need repeatable JSON utilities as part of a QA or documentation workflow.
When to use
Related tools
Privacy
Format reduced samples whenever possible. Avoid pasting production secrets, access tokens, private customer payloads or confidential API responses.
Frequently asked questions
Does formatting change JSON values?
No. Formatting should only change indentation and whitespace. The keys, strings, numbers, booleans and arrays stay the same.
What is the difference between format and minify?
Format adds indentation for readability. Minify removes unnecessary whitespace for compact transport or storage.
Can this validate an API contract?
It can confirm that the JSON parses, but contract checks should be done with JSON Schema or application-specific validation.
Limitations / when not to use
Formatting only changes whitespace and readability. It does not prove that the payload follows a business contract, so use JSON Schema when field types and required properties matter.