Aadhar Validator

The tool validates a 12-digit Aadhaar number for correct length, numeric content, and Verhoeff checksum. It accepts input with spaces or separators and normalizes to a 12-digit string. It is designed for data teams ingesting Aadhaar-based records and for pre-validation before downstream processing.

Conceptually, validation follows normalization, structural checks, and checksum calculation. The Verhoeff routine derives the 12th digit from the first 11 and compares it to the provided 12th digit; any mismatch marks the identifier invalid and a specific error is returned.

The primary value is local, deterministic verification that does not rely on external services, reducing latency and preserving privacy in pipelines. It supports batch processing and provides detailed error codes to guide remediation. This is useful for payroll, lending onboarding, and government program workflows that require clean Aadhaar formatting prior to lookups.

Core features include exact length enforcement, digit-only validation, Verhoeff checksum, optional batch processing, and granular error reporting. The tool helps prevent typos, failed matches, and data quality issues, while enabling privacy-conscious deployments to minimize exposure of sensitive identifiers.