MRZ Calculator

The MRZ Calculator implements the full ICAO Doc 9303 specification for TD1, TD2, TD3, MRV-A and MRV-B documents. Use it to compute check digits with weights 7-3-1, normalize names with transliteration of diacritics, validate dates and country codes, and produce ready-to-print MRZ lines that pass standard verification. With support for multiple document types and all required field formats, it dramatically reduces the risk of human error and failed scans at border control or automated checkpoints. Instead of manually juggling character sets, length constraints, and complex weighting rules, you can rely on a single, consistent process that gives you immediate, standards-compliant output. Whether you are integrating MRZ generation into an enrollment workflow, building a verification system, or simply testing sample documents, this tool offers both precision and reliability. It not only catches common issues—such as invalid characters, incorrect field lengths, and miscalculated check digits—but also guides you toward fully compliant corrections. By automating the intricate details of ICAO 9303, the MRZ Calculator lets you focus on your core application, confident that every MRZ it produces will stand up to real-world inspection and machine reading. In addition to its robust standards compliance, the MRZ Calculator is designed to fit comfortably into real development environments. A clean, well-documented interface allows you to feed in raw data—names, dates, document numbers, issuing states—and receive fully formatted MRZ lines in return. Clear error messages and actionable hints make it easy to refine your inputs until they match the strict structure required by ICAO 9303, even if you are not an expert in the specification.