JSON Validator

Validate JSON syntax and structure

Shortcuts: Ctrl/Cmd + Enter copy formatted, Ctrl/Cmd + Shift + F try fix, Ctrl/Cmd + Shift + L load valid, Ctrl/Cmd + Shift + I load invalid, Ctrl/Cmd + Backspace clear.

Drop a file or click to browse

Common JSON Errors

⚠️ Trailing Comma

[1, 2, 3,]

⚠️ Single Quotes

{'key': 'value'}

⚠️ Unquoted Keys

{key: "value"}

⚠️ Comments

{"a": 1} // not allowed

⚠️ Missing Comma

{"a": 1 "b": 2}

⚠️ Undefined

{"a": undefined}