CSR Parser

CSR Parser converts CSR text into a structured data model. It accepts PEM or DER formats and outputs fields such as version, subject, issuer, public key algorithm, key size, SANs, and extensions. Conceptually, the tool treats the CSR as a data container and applies ASN.1 decoding rules to reveal its components, then normalizes names and encodes results in a consistent JSON-ready structure for downstream automation. The primary beneficiaries are security engineers, certificate admins, and auditors who need reliable CSR insight without manual parsing. Unique value lies in precise field extraction, RFC-aligned validation, and straightforward export paths for integration with ticketing, inventory, and compliance systems. Core features include automatic format detection, robust error reporting for malformed CSRs, SAN and keyUsage extraction, and optional JSON export. Use cases include pre-issuance checks, CA policy conformity verification, and data synchronization across certificate lifecycles. The tool emphasizes data accuracy, deterministic outputs, and interoperability with existing security tooling, reducing manual review time and enabling repeatable processes for CSR handling.