JSON フォーマッター＆バリデーター

Our free JSON Formatter & Validator instantly formats messy JSON into readable, indented code and validates it for syntax errors. Developers use it daily to debug API responses, clean up configuration files, and minify JSON for production. No installation needed — just paste and go.

使い方

1. 1Paste your raw or minified JSON text into the input box on the left.
2. 2Click "Format" to beautify the JSON with proper indentation.
3. 3Click "Minify" to compress the JSON by removing all whitespace.
4. 4If there are syntax errors, the error message will show where the problem is.
5. 5Use the copy button to copy the formatted output.

主な機能

• ✓Format (beautify) JSON with 2-space indentation
• ✓Minify JSON to reduce file size
• ✓Validate JSON and show clear error messages
• ✓Handles nested objects and arrays
• ✓Copy output to clipboard instantly

よくある質問