JSON Formatting and Validation: A Developer Guide
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data interchange format. It is easy for humans to read and write, and easy for machines to parse and generate. JSON is the standard for API communication.
Why Format JSON?
Formatted JSON (pretty-printed) uses indentation and line breaks to make data readable. This is essential for debugging, logging, and reviewing API responses. Our JSON formatter does this instantly.
Common JSON Errors
Trailing commas, unquoted keys, single quotes instead of double quotes, and missing brackets are the most common JSON errors. Our validator catches all of these.
How to Use the JSON Formatter
1. Paste your JSON into the input area. 2. Click Format/Pretty Print. 3. Copy the formatted output. The tool also validates and shows errors if your JSON is invalid.
JSON Best Practices
Always use double quotes for keys and string values. Use consistent indentation (2 or 4 spaces). Validate JSON before deploying. Use JSON Schema for complex validation requirements.