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JSON 포맷터

JSON 데이터를 포맷, 검증, 압축하세요. 오류 메시지와 통계, 맞춤 들여쓰기로 즉시 구문 검증이 가능합니다.

모든 처리는 브라우저에서 이루어집니다 — 데이터가 서버로 전송되지 않습니다. 표준 JSON 형식(RFC 8259)을 지원합니다.

How to Use This Tool

  1. 1

    Paste your JSON

    Paste or type raw JSON into the text area. You can also click 'Sample' to load example data.

  2. 2

    Validate and format

    The tool instantly validates your JSON. Click 'Format' to pretty-print it with your chosen indentation (2, 4, or 8 spaces).

  3. 3

    Minify if needed

    Click 'Minify' to compress the JSON by removing all whitespace — useful for reducing payload sizes in API requests.

  4. 4

    Review stats and copy

    View total keys, nesting depth, and file size. Click 'Copy' to copy the formatted or minified JSON to your clipboard.

Frequently Asked Questions

What is JSON and why does formatting matter?
JSON (JavaScript Object Notation) is a lightweight data-interchange format. Formatting (pretty-printing) adds indentation and line breaks, making it human-readable for debugging and code review.
How does JSON validation work?
The tool uses the browser's built-in JSON.parse() function. If parsing succeeds, the JSON is valid. If it fails, the specific syntax error message is displayed to help you find the issue.
What is the maximum JSON size supported?
The tool accepts up to 500,000 characters of input, which is sufficient for most API responses and configuration files.
Can this tool fix broken JSON?
No. This is a formatter and validator, not a repair tool. It will report the exact error location to help you fix issues manually — such as missing commas, unclosed brackets, or invalid escape sequences.