JSON Formatter
Format, validate, and beautify JSON data
JSON Input
1 lines | 0 characters
Formatted Output
Enter valid JSON to see the formatted output
Frequently asked questions
What causes 'Invalid JSON' errors?
Common issues: missing quotes around keys, trailing commas, single quotes instead of double, unescaped special characters, or undefined/NaN values. JSON is stricter than JavaScript objects.
Should I use 2 or 4 spaces for indentation?
Both are widely used. 2 spaces saves space and is common in frontend (npm default). 4 spaces is more readable and common in other languages. Pick one and be consistent.
Why minify JSON?
Minification removes whitespace, reducing file size for faster network transfer. It's essential for production APIs and configuration files. Human readability is sacrificed for efficiency.