JSON Formatter & Validator
Format, validate, minify, and convert JSON data online with syntax highlighting
JSON Formatter & Beautifier
Paste JSON and format with proper indentation and syntax highlighting
JSON Validator
Validate JSON and see detailed error messages
JSON Minifier
Compress JSON by removing unnecessary whitespace
JSON to CSV Converter
Convert JSON array to CSV format
JSON Tree Viewer
Visual collapsible tree view of JSON structure
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How to Use the JSON Formatter
Paste your raw or minified JSON into the input area. The formatter instantly adds proper indentation, line breaks, and syntax highlighting to make the data readable. Choose between 2-space, 4-space, or tab indentation based on your preference.
The tool validates your JSON structure while formatting. If there are syntax errors — missing brackets, extra commas, or invalid values — the error message points to the exact location so you can fix it before formatting.
Copy the formatted output or download it as a .json file. Use the minify option to compress formatted JSON back to a single line for production use or API transmission.
Why Use This Tool
API responses, configuration files, and database exports often contain JSON as a single compressed line or with inconsistent formatting. Reading and debugging unformatted JSON wastes time and increases the chance of missing errors.
This formatter transforms any JSON into a clean, consistently indented structure in one click. It is essential for developers debugging API responses, DevOps engineers reviewing config files, and anyone working with JSON data regularly.
Key Features
- Instant formatting with customizable indentation
- Real-time JSON syntax validation
- Syntax highlighting for keys, strings, numbers, and booleans
- Minification for production-ready compressed output
- Large file support for complex JSON structures
- No server upload — all processing in your browser
Frequently Asked Questions
How is this different from the JSON Formatter & Validator?
This is a streamlined formatter focused on quick formatting and beautifying JSON. The JSON Formatter & Validator page includes additional features like side-by-side JSON comparison and more detailed validation reporting. Both tools handle formatting and basic validation.
Can I format JSON with comments?
Standard JSON does not support comments. If your data contains JavaScript-style comments (// or /* */), they must be removed before the JSON can be valid. Some configuration formats like JSONC or JSON5 allow comments, but they are not standard JSON.
What is the maximum JSON size this can handle?
The tool processes JSON of any size your browser can handle in memory, typically several megabytes. For very large files (50MB+), consider using command-line tools like jq or a desktop code editor.
Why does my JSON show a syntax error?
Common JSON syntax errors include: trailing commas after the last item in an array or object, single quotes instead of double quotes around strings, unquoted property keys, comments in the JSON, and missing closing brackets. The error message indicates the line and position where parsing failed.