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🆔 Nano ID / ULID Generator

Nano ID & ULID unified generator with 6 alphabet presets, collision probability calculator, ULID timestamp decode, UUID↔ULID conversion, Client-side computation

ID Type

Alphabet Preset

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Collision Probability Calculator

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Nano ID / ULID unified generator covering two modern unique identifier formats in one tool. The Nano ID section offers 6 alphabet presets (default 64-char, alphanumeric, hex, numbers, lowercase, custom) with adjustable length from 2-64, and a built-in collision probability calculator using the Birthday Problem formula. The ULID section supports generation, decoding, and bidirectional UUID conversion, with optional custom timestamps and color-coded structure visualization. All generation uses browser crypto.getRandomValues with zero dependencies — generated data is not uploaded by the tool.