JSON Formatter & Validator
Paste your JSON below and use the buttons to beautify, minify, validate and copy the result.
How to use this online JSON formatter
This online JSON formatter and validator is built for developers working with REST and JSON APIs. Paste any JSON response or request body into the editor, click Beautify to pretty‑print the data, or use Minify to compress it into a single compact line. The Validate button runs a JSON syntax check and shows a helpful error message if there is a missing comma, bracket or quote.
Because everything runs inside your browser, no JSON is sent to the server. That makes this JSON formatter safe for sensitive payloads such as access tokens, configuration files or test data. You can keep the page open while debugging APIs, pretty‑print responses from Postman or cURL, and copy cleaned JSON directly into your code.
Common things you can do
- Reformat compact API responses into readable, indented JSON.
- Minify configuration files before embedding them into HTML or JavaScript.
- Validate JSON copied from documentation, ChatGPT or other tools.
- Quickly spot type errors, missing commas and unescaped characters.
Example: formatting an API response
Paste a payload such as:
{"user":{"id":1,"name":"Alex","roles":["admin","editor"]}}
and click Beautify. The JSON formatter will expand it into multiple
lines with indentation so that nested objects and arrays are effortless to read.