無料JSON整形＆バリデータ
改行のないJSONを見やすく整形。構文エラーの箇所を的確に特定し、快適なデータ閲覧をサポートします。
Three simple steps to process your files
Input Raw JSON
Paste your unformatted JSON text, load a sample dataset, or type directly into the code workspace.
Format, Minify or Validate
Choose Beautify to apply indentations (2 spaces, 4 spaces, or tabs), Minify to eliminate spaces, or Validate to test syntax.
Copy or Save
Quickly copy the clean JSON string to your clipboard or download it as a standard .json file.
Engineered for speed, fidelity & security
Precise Error Locator
Immediately pinpoint syntax errors with exact line and column numbers for fast debugging.
Interactive Tree View
Collapse and expand deeply nested JSON arrays and object hierarchies with an intuitive graphical explorer.
Multiple Indent Configurations
Switch between 2-space, 4-space, or tab indentation to match your team's code style guidelines.
Safe Client-Side Execution
Never uses unsafe eval(). Protected against Cross-Site Scripting (XSS) and code injection.
One-Click Minification
Strip all whitespaces and line breaks to minimize payload size for production API payloads.
Instant Clipboard Copy
Copy formatted or minified output in a single keystroke for seamless developer workflow.