JSON Tool
JSON Formatter & Validator
Format, minify, and validate JSON payloads instantly.
JSON Formatter Tool
Paste JSON input, then format, minify, validate, or copy the result.
Overview
Use this tool to clean JSON responses and quickly spot syntax issues while debugging API requests and responses.
Examples
Beautify API response
Input
{"user":{"id":1,"name":"John Doe","roles":["admin","editor"]}}Output
{
"user": {
"id": 1,
"name": "John Doe",
"roles": ["admin", "editor"]
}
}Validate malformed JSON
Input
{"id": 1, "name": "John",}Output
Error: trailing comma is not valid JSON.Use cases
- Inspect API responses in readable form.
- Validate snippets copied from logs or docs.
- Share clean payloads in bug reports.
FAQ
Does the formatter send data to a backend?
No. Formatting and validation run in your browser.
Can it minify JSON for request bodies?
Yes. Use Minify to produce compact JSON output.
What happens on invalid JSON?
The tool shows a parsing error and keeps your input unchanged.
Is this useful for large payloads?
Yes for common API payload sizes. Extremely large files may feel slower.