ULID / NanoID / UUID Generator

ULID (Universally Unique Lexicographically Sortable Identifier) is a 26-character base32 ID with a 48-bit millisecond timestamp prefix. Unlike UUID v4 (which is completely random), ULIDs are naturally sortable by creation time — ideal for databases where you need chronological ordering without a separate timestamp column.

NanoID is a tiny, secure, URL-safe ID generator. By default it produces 21-character IDs using a 64-character alphabet. It's smaller than UUID (fewer characters for the same collision probability), supports custom alphabets, and is widely used for session tokens, short URL slugs, and client-side IDs.

The first 10 characters of a ULID encode the Unix timestamp in milliseconds using Crockford Base32. This tool automatically decodes and displays the timestamp when you generate a single ULID, showing you the exact ISO date and time it was created.

Use 'Default (URL-safe)' for most cases — it's the standard NanoID alphabet designed to be safe in URLs, file names, and HTML attributes. Use 'Alphanumeric' if you need IDs that are easier to read aloud or copy. Use 'Hex' for IDs that look like short hashes.

UUID v4 has 122 random bits. ULID has 80 random bits (+ 48-bit timestamp). NanoID with the default alphabet and 21 characters has approximately 126 random bits. All three have astronomically low collision probabilities for practical use — pick based on sortability and size requirements.

Yes. Set the Count field (up to 100) and click Generate. All IDs are displayed in a scrollable list. Click 'Copy All' to copy them as newline-separated text, or copy individual IDs by hovering and clicking Copy.