Paste JSON Text

JSON Formatter and Validator Online

Paste JSON text, choose an indentation style, then format, copy, or download the result.

What This Tool Does

This JSON formatter works with pasted text. Enter JSON in the first textarea, choose the indentation style, and click Format JSON.

If the input is valid JSON, the script writes the formatted result to the readonly output textarea. If the input is invalid, the page shows an error message that starts with Invalid JSON:.

Formatting and Validation

The formatter uses JSON.parse to validate the input and JSON.stringify to create the formatted output. The indentation selector supports 2 spaces, 4 spaces, and tabs.

This page works with pasted JSON text. It does not include a minify action or API schema validation.

Copy, Download, and Reset

  • Copy writes the current output textarea value to the clipboard.
  • Download .json creates a JSON Blob from the output textarea and saves it as formatted.json.
  • Reset Inputs clears the input textarea, output textarea, and error message.

Privacy and Processing

The formatter script reads the textarea value on the page, parses it with JSON.parse, and formats it with JSON.stringify.

Common Uses

  • Making a compact JSON response easier to read.
  • Checking whether pasted JSON can be parsed by the browser.
  • Saving formatted JSON as a formatted.json file.

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Frequently Asked Questions

The formatter accepts pasted JSON text in the input textarea.

When you click Format JSON, the script runs JSON.parse on the input. If parsing fails, the page shows an Invalid JSON: message followed by the parser error.

The indent selector supports 2 spaces, 4 spaces, and tab indentation. The selected value is passed to JSON.stringify.

The Copy button writes the current output textarea value to the clipboard.

The Download button creates a JSON Blob from the output textarea and downloads it as formatted.json.

The formatter script reads the textarea value on the page, parses it with JSON.parse, and formats it with JSON.stringify.