JSON Formatter & Validator
Paste JSON and format it with proper indentation, validate structure and highlight errors. Use this free online tool directly in your browser.
What is JSON Formatter & Validator?
JSON (JavaScript Object Notation) is the universal data format for APIs, configuration files, and data exchange between services. Raw JSON from API responses is often minified — stripped of whitespace to reduce size — making it impossible to read or debug. This formatter beautifies minified JSON by adding proper indentation and line breaks, validates the structure and highlights syntax errors with line and column numbers, and can convert JSON to YAML or minify it for embedding. It also includes a JSON Path search for querying nested values and a tree view for visualizing nested structures. Because everything runs in the browser, you can safely paste internal API payloads and configuration data without worrying about server-side logging.
How to use
- 1
Paste or enter your data in the JSON Formatter & Validator input area.
- 2
Run the conversion, generation, or validation action.
- 3
Copy or download the result for your project workflow.
Common Use Cases
- 1
Beautify compressed API responses from curl or Postman to make them human-readable
- 2
Validate a JSON config file or request payload before deploying to catch syntax errors early
- 3
Convert JSON to YAML for Kubernetes manifests, Helm charts, or GitHub Actions workflows
- 4
Use the JSON Path search to extract a specific nested value without writing code
- 5
Minify JSON before embedding in environment variables where whitespace adds unnecessary size
Try an Example
Example Input
{"user":{"id":42,"name":"Mikey"},"active":true}Expected Output
{
"user": {
"id": 42,
"name": "Mikey"
},
"active": true
}Frequently Asked Questions
What is JSON Formatter & Validator?
JSON Formatter & Validator is a free browser-based utility on Bite Size Tools. Paste JSON and format it with proper indentation, validate structure and highlight errors.
Is JSON Formatter & Validator safe to use with sensitive data?
Yes. Tool processing runs in your browser, so your input is not sent to a server by default in this app.
Can I use JSON Formatter & Validator for production work?
Yes. You can use the output directly in development and production workflows after validating it with your project requirements.