Valid format
- 123-45-6789 -> valid
data validator
SSN Format Validator
Validate US Social Security Numbers for basic format and disallowed ranges—client-side only.
Results
Paste input and validate locally.- Status
- Ready when you validate.
- Details
- Ready when you validate.
- Area
- Ready when you validate.
- Group
- Ready when you validate.
- Serial
- Ready when you validate.
Rules & checks
Requires 9 digits; dashes optional.
Area cannot be 000, 666, or 900–999.
Group and serial cannot be 00 or 0000.
Runs entirely in your browser/offline; no SSNs leave the page.
When to use it
- Pre-validate SSN format in internal tools
- QA CSV imports that include SSNs
- Support teams checking user-provided SSNs for typos
Tips
- Do not store SSNs in logs or error messages
- Apply encryption/PII protections in production systems
Examples
Disallowed area
- 666-12-3456 -> invalid
Zero group
- 123-00-6789 -> invalid
FAQs
- Is anything uploaded?
- No. Validation is local and clears on refresh.
- Do you verify identity or issuance?
- No. This checks format only; it does not verify identity or issuance status.
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