JSON Content Type Validator — Validate Content Type Format in JSON
Free online JSON content type validator. Validate content type format in JSON data with instant pattern checking. 100% browser-based — your data stays private.
What Is This?
JSON is a flexible data format, but when you need to store content type values, they should follow a consistent pattern. Our JSON Content Type format validator checks if content type strings in your JSON data match the expected format: type/subtype; params. All validation happens in your browser — your JSON never leaves your device.
How to Use
Enter your JSON
Paste your JSON data containing the values you want to validate.
Select format
The validator automatically checks for Content Type format: text/html; charset=utf-8.
Review results
Invalid values are highlighted with specific error messages for easy correction.
Examples
text/html; charset=utf-8
To validate content type format in your JSON data, paste your JSON string into the validator. The tool scans every string value and checks if it matches the content type pattern. Invalid values are highlighted with explanations, making it easy to fix data quality issues in your JSON documents.
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Frequently Asked Questions
What is a valid Content Type format?
A valid Content Type format follows the pattern: type/subtype; params. Example: text/html; charset=utf-8.
Does validation work on nested JSON?
Yes, the validator scans all string values at any depth in your JSON structure.
Is my JSON data uploaded anywhere?
No, all processing happens client-side. Your data never reaches any server.