ページを読み込んでいます
Format, minify, validate, and display JSON data in tree view.
Type or paste your JSON data into the text area above.
Click 'Format' for readable indented output, or 'Minify' to remove whitespace and compress.
Review the formatted JSON and click 'Copy' to copy to clipboard. Use Tree View to visually explore the structure.
Please enter JSONJSON Formatter is an online tool that automatically formats JSON data into a readable structure. It streamlines common JSON operations that developers perform daily, such as reviewing API responses, editing configuration files, and debugging. Since it runs entirely in your browser, your data is never sent to any server, making it safe to process sensitive JSON data.
No, all processing happens entirely in your browser. Your input data is never transmitted to any server. You can safely use this tool with JSON containing sensitive information.
You can process JSON files up to 1MB (approximately 1 million characters). For larger files, we recommend splitting the data into smaller chunks.
Format adds indentation and line breaks to make JSON human-readable. Minify does the opposite—it removes unnecessary whitespace and newlines to minimize file size. Minify is useful for API requests and storage optimization.
The tool automatically validates JSON as you type and displays the line and column number of any errors. Common causes include trailing commas, unclosed quotes, and using single quotes (JSON requires double quotes only).
Tree View lets you visually explore the JSON hierarchy. You can click on nodes to expand or collapse them, which is particularly useful for understanding deeply nested data structures. It also shows the count of items in arrays and objects.