18-digit Password Generator

This tool generates an 18-digit numeric password for ephemeral credentials used by IT systems, APIs, and devices. It runs fully client-side, ensuring no data leaves the browser. This design avoids server-side storage and reduces exposure risk; it supports batch mode for generating multiple codes in a single run.
The core logic builds a pool from the selected character set (digits_only by default) and uses a cryptographically secure RNG to select positions to form the password. If a seed is provided, results can be reproduced by a deterministic PRNG seeded from the seed; otherwise, results are non-deterministic.
Use cases include provisioning tokens during device enrollment, API key issuance for short-lived sessions, and secure temporary access codes for automated workflows. The approach emphasizes not storing secrets and enabling quick rotation. The tool’s value lies in client-side generation, reproducibility when seeded, and strict length control, which supports integration into deployment pipelines and automation scripts.