JSON Validator
Validate JSON syntax online and catch errors instantly.
Your data stays in your browser. Nothing is uploaded.
Instantly process JSON in your browser.
JSON Validator checks whether your JSON is syntactically correct and highlights issues so you can fix them quickly.
How to Validate JSON?
Paste your JSON in the input box.
Click on the "Validate" button.
See whether your JSON is valid or invalid in the right panel.
Fix any reported syntax errors and validate again.
Features
- Instant syntax validation
- Clear error messages in the output panel
- Works with nested JSON
- No upload required
- 100% Free and Unlimited
- Your data never leaves your browser
Example
{"name":"Karthi","age":30,"skills":["Angular","Java"]}{
"name": "Karthi",
"age": 30,
"skills": [
"Angular",
"Java"
]
}Frequently Asked Questions
What is a JSON Validator?
A JSON Validator checks whether text follows JSON syntax rules, such as correct braces, commas, quotes, and value types.
What errors can this tool detect?
It detects common issues like missing commas, trailing commas, unquoted keys, mismatched brackets, and invalid values.
Does validation change my JSON?
No. Validation only checks the structure. Your original input stays unchanged unless you format or minify it.
Why is my JSON invalid?
Typical causes include trailing commas, single quotes instead of double quotes, comments inside JSON, or unmatched braces.
Is the JSON Validator free to use?
Yes. Validate unlimited JSON online for free with private browser-side processing.