JSON Formatter
Format, minify, and validate JSON — with clear error messages.
How to use this tool
- 1
Paste your JSON into the input box.
- 2
Click "Format" to pretty-print it, or "Minify" to compact it.
- 3
Use "Validate" to check for syntax errors, then copy the result.
Frequently asked questions
Does this validate JSON against a schema?+
No, it checks for valid JSON syntax, not a specific schema.
Is my JSON sent anywhere?+
No, formatting and validation run entirely in your browser.
Is there a size limit?+
No hard limit — very large JSON may just take longer to process.