Why use an online JSON formatter?
JSON formatting makes raw payloads readable by adding indentation and line breaks, which helps when debugging APIs, editing config files, or reviewing logs.
What this JSON formatter offers
- Pretty print JSON with 2 or 4 spaces for readability.
- Validate JSON and show an error when syntax is invalid.
- Minify JSON by selecting indentation = 0.
FAQ
Is this JSON formatter also a validator?
Yes. If your JSON is invalid, the tool shows an error message instead of formatted output.
Does this tool send my JSON to a server?
Formatting happens in your browser session. If you later add server logging/analytics, update this statement accordingly.
How do I minify JSON?
Set indentation to 0 (Minify) to remove extra whitespace and line breaks.
Why does my JSON fail to parse?
Common issues include trailing commas, unquoted keys/strings, or using single quotes instead of double quotes.
Can I format large JSON payloads on mobile?
Yes—this page is designed to work on mobile, but extremely large payloads may slow down older devices.