JSON Prettifier & Formatter
Paste raw or minified JSON below to format and validate it instantly. All processing happens in your browser.
Format and Prettify JSON Online
This JSON prettifier and formatter converts messy or minified JSON into clean, readable, properly indented code. Whether you're debugging API responses, reviewing configuration files, or inspecting data structures, formatted JSON makes everything easier to read and understand.
JSON (JavaScript Object Notation) is widely used for APIs, web applications, configuration files, and data exchange. However, production systems often compress JSON to reduce file size. That makes it hard to inspect. This tool restores proper spacing and indentation instantly.
JSON Formatter vs JSON Minifier
Prettify JSON (Beautify)
Formatting adds indentation, line breaks, and spacing. This improves readability and makes nested objects easier to understand.
Minify JSON
Minification removes unnecessary whitespace without changing the data structure. This reduces file size and is commonly used in production environments.
If you need to convert structured data into spreadsheet format after formatting, try our JSON to CSV converter.
Built-In JSON Validation
This tool also validates your JSON. If your data contains syntax errors, the formatter will show an error message instead of producing invalid output.
Common JSON Errors
- Missing commas between properties
- Unmatched brackets or braces
- Using single quotes instead of double quotes
- Trailing commas after the last property
For a deeper breakdown of syntax issues, see our guide on common JSON errors and how to fix them.
Why Use an Online JSON Prettifier?
Formatting JSON manually is inefficient and error-prone. An automated JSON formatter ensures consistent indentation and structure instantly. This improves debugging speed and reduces mistakes during development.
If you’re new to the format, review our guide on what JSON is and how it works.
Browser-Based JSON Formatting
All formatting and validation happens locally in your browser. No data is uploaded or stored. This makes it suitable for sensitive API responses and private configuration files.
FAQ – JSON Prettifier & Formatter
How do I prettify JSON?
Paste your JSON into the tool above and click “Format JSON.” Proper indentation and spacing will be applied automatically.
How do I minify JSON?
Click “Minify JSON” to remove whitespace and compress the file while preserving valid structure.
Why is my JSON not formatting?
If your JSON contains syntax errors such as missing commas or mismatched brackets, it cannot be formatted until corrected.
Does formatting change my data?
No. Formatting only changes whitespace and layout. The underlying data remains the same.
Is my JSON data stored anywhere?
No. All processing runs locally in your browser.