JSON US ZIP Code Validator — Validate US ZIP Code Format in JSON
Free online JSON postal code us validator. Validate postal code us 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 postal code us values, they should follow a consistent pattern. Our JSON US ZIP Code format validator checks if postal code us strings in your JSON data match the expected format: XXXXX or XXXXX-XXXX. 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 US ZIP Code format: 90210.
Review results
Invalid values are highlighted with specific error messages for easy correction.
Examples
90210
To validate postal code us format in your JSON data, paste your JSON string into the validator. The tool scans every string value and checks if it matches the postal code us 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 US ZIP Code format?
A valid US ZIP Code format follows the pattern: XXXXX or XXXXX-XXXX. Example: 90210.
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.