Free JSON Formatter & Beautifier Online
Beautify or minify JSON instantly in your browser. Keeps every value, number and key order exactly as written. Nothing is uploaded.
JSON Formatter tool
Runs entirely in your browser. Nothing you paste is uploaded or stored.
Input JSON
Formatted JSON
About this tool
Paste a compact or messy JSON payload and get a readable, consistently indented version, or minify it to a single line for a request body or config value.
Formatting only changes whitespace. Values, number literals (including large IDs beyond JavaScript's safe integer range), string escapes and key order are kept exactly as you wrote them, which matters when you're comparing payloads or pasting them into tests.
How to use it
- Paste JSON into the editor, drop a .json file onto it, or open a file from your computer.
- Choose Beautify (with 2 or 4 spaces, or tabs) or Minify.
- Copy the result or download it as a file.
Limitations
- JSON5, comments and trailing commas are reported as errors rather than accepted.
Example
{"orderId":9007199254740993,"status":"SHIPPED","items":[{"sku":"A-100","qty":2}]}{
"orderId": 9007199254740993,
"status": "SHIPPED",
"items": [
{
"sku": "A-100",
"qty": 2
}
]
}Common use cases
Reading API responses from logs
Single-line JSON copied from application logs, MuleSoft flows or Kibana becomes readable in one click.
Preparing request bodies
Minify a payload before pasting it into a cURL command, a Postman variable or a properties file.
Writing test fixtures
Format expected responses consistently before saving them as JUnit or REST Assured fixtures, so code reviews show real changes only.