JSON Formatter & Validator
Format, validate, and beautify JSON data online. Free JSON formatter with syntax highlighting, error detection, and minify option. Works instantly in your browser.
Enter JSON to see results
Frequently Asked Questions
Can I validate JSON syntax?
Yes — if your JSON is invalid, the tool will show an error message indicating the syntax issue. Fix the error and try again.
Can I format large JSON files?
Yes, the tool handles files up to several MB. For extremely large files (100MB+), processing may be slow due to browser memory limits.
How to Use
Paste JSON
Paste your JSON data into the input area. Supports objects, arrays, nested structures.
Format
Click Format to beautify with proper indentation, or Minify to compress.
Copy Result
Copy the formatted JSON to your clipboard with one click.
Tips & Best Settings
Tips
Use 2-space indentation for web projects, 4-space for config files. Minified JSON saves bandwidth in API responses. Always validate before deploying to production.
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