Developer Tools
JSON Formatter & Validator
Paste your JSON to format, validate, and minify it instantly. Syntax errors are highlighted with a clear message.
How to Use
- Paste your JSON into the text area.
- Click Prettify to indent and format, or Minify to compress.
- Use Validate to check for syntax errors without changing the text.
FAQ
What indent size is used?
Prettify uses 2-space indentation, which is the most common convention.
Does it support JSON5 or comments?
No — only standard JSON (RFC 8259) is supported. Comments and trailing commas will cause a validation error.
Is my JSON sent anywhere?
No. All processing is done locally in your browser.