Validation•Client-Side Processing
JSON Validator
Validate JSON syntax according to strict RFC 8259 specifications with exact error line indicators.
Developer workbench
⌘ / Ctrl + Enter to runConfigure. Run. Inspect.
Runs locally. Inputs and results are not automatically saved.
73 input bytes
Output
How to Use JSON Validator
01
Paste your JSON content into the editor.
02
Click 'Validate JSON'.
03
View green validation confirmation or exact line/character coordinates for syntax errors.
Frequently Asked Questions
Does this catch trailing commas?
Yes, standard JSON disallows trailing commas after objects or arrays, which this validator flags immediately.
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