Input
0 bytesOutput
How to Use This Tool
Paste your JSON
Paste or type raw JSON into the input panel on the left.
Choose a mode
Select Beautify for readable output or Minify to compress.
Copy the result
Click Copy to grab the formatted output. Errors are flagged instantly.
Features
Real-Time Validation
Syntax errors are detected and displayed as you type — no submit button needed.
Beautify & Minify
Toggle between human-readable indented output and compact single-line JSON.
One-Click Copy
Copy formatted JSON to your clipboard instantly.
Sample Data
Load example JSON to see the formatter in action.
Frequently Asked Questions
What is JSON formatting?
JSON formatting (or pretty-printing) adds indentation and line breaks to compact JSON, making it easier to read and debug. Minification does the reverse — removing whitespace to reduce file size for production use.
Does this tool validate my JSON?
Yes. The formatter uses a strict JSON parser that catches syntax errors like missing commas, unmatched brackets, trailing commas, and single-quoted strings. Invalid JSON is flagged with a descriptive error message.
Is my data sent to a server?
No. All formatting and validation happens entirely in your browser. Your JSON never leaves your device.
What is the maximum JSON size supported?
There is no hard limit. The tool handles files up to several megabytes comfortably. For very large files, processing may take a moment.
What is the difference between JSON and JSONC?
Standard JSON does not allow comments or trailing commas. JSONC (JSON with Comments) is an extension used by VS Code and TypeScript configs that permits both. This tool validates strict JSON.