JSON Formatter
Validate, format, beautify or minify JSON locally in your browser. Open files, read syntax-highlighted output and preserve large numbers exactly.
JSON formatter
Your data. Your device. Clear results.
Maximum input: 2 MB (2,000,000 bytes). Maximum output: 8 MB. Processing stops after 15 seconds; your original input is kept. Strict JSON only: no comments or trailing commas. Up to 200 nesting levels. Number text, duplicate keys and key order are preserved.
Formatted result
About
Validate, format, beautify or minify JSON locally in your browser. Open files, read syntax-highlighted output and preserve large numbers exactly.
Validate before using
Formatting validates the JSON syntax. It does not check an application-specific schema. Large number text, key order and duplicate keys are preserved in the formatted output.
Keep your data local
Paste or open a file, then format, minify, copy or download it. This tool does not upload or persist your input.
Try this
Choose Load example, then Format. The ID 9007199254740993 keeps every digit. Minify removes whitespace without converting that number to a rounded JavaScript value.
Use the result as one part of your troubleshooting. Network information can change over time.
A useful next step
- Compare two JSON texts — Format both with the same indentation first to reduce formatting-only differences.