JSONフォーマッター
JSONのフォーマット、検証、美化
オプション:
機能
- Format and beautify JSON with configurable indentation
- Validate JSON with precise error position reporting
- Sort object keys alphabetically
- Download formatted JSON file
- Works entirely in your browser — no data sent to servers
使い方
- 1 Paste JSON
Paste or type your JSON content in the input editor.
- 2 Configure options
Choose indent size (2 spaces, 4 spaces, or tab) and optionally enable key sorting.
- 3 Click Format
Press the Execute button to format your JSON.
- 4 Copy or Download
Copy the result to clipboard or download as a .json file.
よくある質問
Is this JSON formatter free?
Yes, this tool is completely free to use with no signup required.
Is my data safe?
All processing happens in your browser. Your data never leaves your device.
What is JSON formatting?
JSON formatting (or beautification) adds proper indentation, line breaks, and spacing to make JSON readable by humans.
Can I format large JSON files?
Yes, the tool can handle JSON files up to several MB. Performance may vary based on your device.
What does "Sort Keys" do?
It alphabetically sorts all object keys in the JSON, which is useful for comparing two JSON objects.