JSON pretty print and validation
Make compact JSON readable, verify syntax, and minify again when needed.
JSON data from APIs and logs is often hard to inspect because it arrives as one long line. A JSON pretty print tool adds indentation and line breaks so objects, arrays, and nested fields are easy to scan. This is useful during integration work, debugging, analytics queries, and backend troubleshooting. Instead of opening a separate IDE plugin, you can paste JSON here and instantly switch between readable and compact formats. If parsing fails, the page keeps your original input and reports the syntax error so you can fix it quickly.
This page is designed for privacy and speed. Parsing and formatting happen in your browser with no server upload of the JSON payload. That makes it suitable for internal API examples, test fixtures, and temporary debugging snippets that you do not want to share externally. You can copy or download output for documentation, tickets, and commit notes. The same interface also includes minify and validate actions so you can keep one workflow from inspection to production-ready payload size.
Ready.
Example
Input:
{"user":{"name":"alex","roles":["admin","editor"]}}
Output:
{
"user": {
"name": "alex",
"roles": [
"admin",
"editor"
]
}
}
FAQ
What happens if JSON is invalid?
The tool shows an error status and does not overwrite the input text.
Can this minify JSON too?
Yes. Choose Minify JSON in the operation selector.
Is my API data uploaded?
No. Parsing and formatting run only in the browser.
Does it support arrays and nested objects?
Yes. Any valid JSON structure can be formatted.
Can I use this on mobile?
Yes. The page is responsive and works on mobile browsers.
Can I save formatted output?
Yes. Use Copy Result or Download .txt.