Invoice Number Generator

This sequential identification utility creates unique invoice numbers following customizable formats (numeric sequences, alphanumeric patterns, date-prefixed codes) ensuring consistent billing documentation and preventing duplicate transactions. Users configure number patterns specifying prefix characters, numerical padding lengths, increment steps,and optional date components (year, month), then generate batches matching specifications. The system maintains sequential integrity preventing skips or duplicates, supports custom starting values for migration from existing numbering schemes, and offers preview modes verifying format correctness before large batch generation. Bulk mode produces extensive number ranges for pre-allocation, export functions output CSV files importable into accounting software, and reset capabilities restart sequences for new fiscal periods. Applications include initializing invoice numbering for new businesses establishing systematic billing, regenerating sequential numbers replacing ad-hoc manual systems, creating unique identifiers for quote-to-invoice workflows tracking document evolution, or demonstrating invoice management best practices in accounting education emphasizing audit trail importance through consistent numbering schemes.