lockProcessed entirely in your browser. Your input is not uploaded.

JSON Formatter & Validator

Prettify, minify, and validate nested JSON payloads with accurate syntax error line & column highlighting.

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How to use the JSON Formatter & Validator

1

Paste JSON

Drop your raw JSON string into the editor.

2

Choose Indentation

Select 2 spaces, 4 spaces, or Minify.

3

Inspect & Copy

View formatted output or see exact line/column of syntax errors.

Key Features & Accuracy

verifiedSyntax Error Pointer

Pinpoints exact line and column number of missing quotes, commas, or brackets.

verifiedPayload Telemetry

Shows payload size in bytes and confirms RFC 8259 compliance.

Frequently Asked Questions

No. All formatting and validation happens in your local browser JavaScript runtime.