JSONフォーマッター＆検証
JSONをオンラインでフォーマット、整形、圧縮、検証。無料で登録不要。
What is JSON Formatter?
JSON (JavaScript Object Notation) is a lightweight data-interchange format. This JSON formatter tool helps you format, beautify, minify, and validate JSON data. Simply paste your JSON, click Format, and get a clean, readable output. Perfect for debugging API responses, config files, and data processing.
機能
- Format & beautify JSON with custom indentation (2, 4, or 8 spaces)
- Minify JSON for production use
- Validate JSON syntax with detailed error messages
- 100%クライアント側処理 — データはブラウザから送信されません
Frequently Asked Questions
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- Paste your JSON data into the input field on the left
- Choose your preferred indentation (2, 4, or 8 spaces)
- Click 'Format / Beautify' for readable output, or 'Minify' for compact output
- Copy the result using the copy button
Common Use Cases
- Debugging API responses and payloads
- Formatting configuration files (package.json, tsconfig.json)
- Validating JSON data before processing
- Minifying JSON for production use