Mock Code Generator

Purpose & User Intent: The Nitro Generator Online tool creates mock codes for testing in development, QA, and integration environments. Target users are software developers, testers, and automation engineers who need valid-looking codes without using real credentials. It solves the problem of generating large batches of unique tokens with configurable length and character sets.
Core Logic & Features: The tool can generate codes by sampling from a defined alphabet to a specified length, with optional prefix or suffix. Required features include input validation, duplicate avoidance, and deterministic mode via seed. Optional features include multiple output formats and per-code metadata.
Inputs & Outputs: Inputs include quantity (integer), length (integer, number of characters), charset (choices: alpha, numeric, alphanumeric, hex), seed (string, optional), prefix (string, optional), and output_format (json, csv, or newline-delimited). Outputs include codes (array of strings) and a run_summary with counts and settings.
Algorithms & Calculations: Uses a cryptographically secure RNG when seed is not provided, or a deterministic PRNG when a seed is provided. Ensures uniqueness by checking newly generated codes against the current set; the maximum possible unique codes equals alphabet_size^length. If quantity exceeds this limit, the tool reports an error.
Error & Edge Cases: Handles invalid inputs (length < 1, quantity <= 0, unsupported charset), and detects insufficient space for the requested unique codes. If external randomness is unavailable, falls back to internal pseudo-random generation. Industry/Region & Localization: Locale-neutral; uses standard ASCII alphabets by default; supports customization for different development regions and environments. Localization can apply to date/time formatting in outputs if used in metadata. Assumptions & Exclusions: Assumes all generated codes are for internal testing only; it does not connect to external services, generate real credentials, or assist in unauthorized access.