JSON Validator and Formatter
Validate and format your JSON with custom indentation
JSON
FAQ
How to validate JSON?
Paste your JSON in the text area. The tool automatically detects syntax errors and shows the line where the problem occurred.
What is invalid JSON?
Invalid JSON usually has: extra commas, unclosed quotes, unbalanced braces/brackets, or unquoted values (except numbers and booleans).
How to format JSON?
After pasting the JSON, choose the indentation level (2 or 4 spaces, or tabs) and click Format. The JSON will be reorganized with the chosen indentation.