Developer tool
JSON Formatter & Validator
Format, minify and validate JSON locally with clear syntax error messages.
USING THIS TOOL
How JSON Formatter & Validator helps
Paste JSON, then format with indentation, minify, validate or download the transformed result.
Method and assumptions
JSON.parse validates syntax and JSON.stringify regenerates standards-compliant JSON without evaluating code.
Example
The text {"name":"Ada","active":true} becomes a readable multi-line structure when formatted.
Know the limits
Check your inputs and verify important financial, health, legal, educational or property decisions using the relevant professional or official source. Results depend on stated assumptions.