JSON Formatter & Validator

Paste raw JSON to format it with readable indentation, validate its syntax, or minify it into a compact string.

About the JSON Formatter

JSON (JavaScript Object Notation) is the most widely used data interchange format for APIs, configuration files, and data storage. Minified JSON removes all unnecessary whitespace to reduce payload size, while formatted JSON adds indentation and newlines to make the structure readable.

The live validator checks your JSON as you type and provides a clear error message including the character position when a syntax error is found. This is particularly useful when debugging API responses or hand-editing configuration files.

Frequently Asked Questions

What does the JSON formatter do?

The formatter parses your JSON and re-outputs it with consistent 2-space indentation, making nested structures easy to read. If the JSON is invalid, an error message explains what went wrong.

What does minify do?

Minify removes all unnecessary whitespace from your JSON, producing the most compact valid representation. This is useful before including JSON in API responses or configuration files where file size matters.

Does the validator check JSON Schema?

No. The validator only checks that the text is syntactically valid JSON according to RFC 7159. It does not validate against a JSON Schema definition.

Why is my JSON showing an error?

Common JSON errors include trailing commas (not allowed in standard JSON), single quotes instead of double quotes, unquoted object keys, and comments (JSON does not support comments). The error message will indicate the position of the problem.

Is there a size limit?

There is no enforced limit, but very large JSON documents (several MB) may slow down your browser. For processing large JSON files, a command-line tool like jq is more appropriate.

Related Tools