JSON Validator
Paste your JSON below to instantly check for syntax errors.
What is a JSON Validator?
A JSON validator checks whether your JSON text is syntactically correct according to the JSON specification (RFC 8259). Common errors include missing commas, unquoted keys, trailing commas, and mismatched brackets.
Why is my JSON invalid?
The most common JSON errors are: missing or extra commas, keys not wrapped in double quotes, single quotes instead of double quotes, trailing commas after the last item, and unclosed braces or brackets.
JSON Formatter & Beautifier
Prettify minified or messy JSON with proper indentation.
What is JSON Formatting?
JSON formatting (or beautifying) adds proper indentation and line breaks to compressed JSON, making it human-readable. This is especially useful when working with API responses or configuration files.
JSON Minifier
Strip whitespace from JSON to reduce file size for production use.
Why Minify JSON?
Minifying JSON removes all unnecessary whitespace characters, reducing file size — often by 20–40%. This speeds up API responses and reduces bandwidth usage in production environments.
JSON Tree Viewer
Explore JSON as an interactive, collapsible tree structure.
What is a JSON Tree Viewer?
A JSON tree viewer renders JSON as a collapsible hierarchical tree, making it easy to navigate deeply nested structures. Click any node to expand or collapse it.