Format up to 50 JSON files at once and download as a ZIP.
Drop files here or click to browse
Up to 50 files, max 50MB each
Paste a complete JSON value into the input editor, then select your indentation before pressing Format. Start with the small object below: the output separates its property onto an indented line without changing the value. Use Copy or Download after checking the result. If parsing fails, correct the indicated syntax before formatting again; this operation does not repair an invalid response automatically.
Use the single upload control for one document, or the bulk area for separate files. Bulk uploads allow 50MB per file; the single upload accepts 100MB and warns above 10MB. Large documents still depend on browser memory. Processing happens in your browser; choosing Share or signing in to save sends your selected content to the service.
Input: {"name":"Ada"}
Format, 2 spaces:
{
"name": "Ada"
}
A JSON formatter is a tool that beautifies and validates JSON data by adding proper indentation, line breaks, and syntax validation. It's essential for debugging APIs, reading configuration files, and ensuring data integrity in web development.
Choose indentation, format valid JSON, inspect its tree or minify the output. Syntax checks and JSON Schema contract checks are separate operations.
Processing runs in your browser. Choosing Share uploads the selected tool state; anyone with the link can open it. Signing in to save sends content to your account library and records save history. Review the selection before either action. Closing the page does not delete those copies. Copying locally does not create a server share.
Single-file uploads: 100 MiB. Processing time and memory use depend on your device and file complexity. Bulk uploads: 50 MiB per file.
Our advanced validator detects syntax errors, missing brackets/braces, trailing commas, unquoted keys, invalid data types, escape character issues, and structural problems with detailed error messages.