JSONフォーマッター
JSONデータをオンラインでフォーマットして美化します。シンタックスハイライト付きでJSONを検証、圧縮、整形します。
JSON入力
機能紹介
The JSON Formatter tool lets you quickly pretty-print, inspect, and clean up JSON data in your browser. It highlights structure, makes complex payloads easier to read, and helps you prepare JSON for debugging, documentation, or API development.
このツールを使うタイミング
Use this tool whenever you need to read or debug JSON: inspecting API responses, cleaning up minified payloads, preparing examples for documentation, or checking configuration files before deployment.
使い方
Paste or upload your JSON
Paste JSON text into the input box, or copy it directly from an API response, log file, or configuration file.
Format and validate
Click the format button to pretty-print the JSON with indentation and syntax highlighting. If the JSON is invalid, you will see an error message.
Analyze the structure
Scroll through the formatted JSON to inspect nested objects and arrays. Use indentation to quickly understand the structure.
Copy or reuse the result
Copy the formatted JSON for use in code, documentation, or further processing with other tools.
使用例
Debugging a failing API call
You receive a 400 error from an API and suspect the JSON body is malformed. Paste the payload into this tool to locate the exact line and column of the syntax error.
Cleaning up minified JSON logs
Your application logs JSON in a single line for performance reasons. Use this tool to reformat the log entry into readable, well-indented JSON for analysis.