What does this JSON validator check?
It checks whether your JSON input is syntactically valid and helps identify common errors such as missing commas, invalid strings, or unclosed brackets.
Validators
JSON Validator
Validate JSON syntax and find common JSON formatting errors directly in your browser.
Tool
JSON Validator
Validate JSON syntax and find common JSON formatting errors directly in your browser.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this free JSON Validator to check JSON data for syntax errors such as missing commas, invalid quotes, trailing commas, unclosed brackets, duplicate-looking structures, and malformed values. The validation runs directly in your browser, so your JSON does not need to be uploaded to a server.
Examples
- {"name":"Anna","age":32}
- [{"id":1},{"id":2}]
Frequently Asked Questions
Can this tool format JSON too?
The main purpose is validation, but the tool may also show formatted output when the JSON is valid.
Is my JSON uploaded?
No. The validation is designed to run locally in your browser.