NIP and REGON Generator

The NIP and REGON Generator creates synthetic Polish tax and registry identifiers for testing and development workflows. It supports two types (NIP and REGON), accepts a quantity, and outputs formatted strings suitable for fixtures and test datasets. The tool emphasizes data safety by labeling all results as synthetic, ensuring they cannot be used for real registrations. Conceptually, it follows official formatting and checksum concepts without exposing actual entities. It can seed randomness for repeatable datasets and export results for integration tests. In use, developers and QA engineers benefit from rapid generation of multiple, format-compliant identifiers that mirror real-world structures, enabling realistic API responses, database seeds, and data validation scenarios without risk to production data. Core features include type selection, count control, optional formatting, deterministic seeding, and export options. The tool handles edge cases such as invalid input types, out-of-range counts, and conflicting formatting rules by providing explicit synthetic-data-safe outputs. Use cases include API mock responses, test fixtures, data validation pipelines, and demonstration datasets. The generator adheres to Poland-specific conventions for digit positions and typical display formats (digits-only or grouped). While the numbers resemble real identifiers in structure, they are clearly marked as TEST data to prevent misuse. This makes it valuable for development teams requiring realistic test cases while maintaining compliance and safety during QA cycles.