UUID & ULID Generator/Validator

Real crypto-random UUID v4 and spec-correct ULIDs

Generates UUID v4 using crypto.getRandomValues with correct version and variant bits per RFC 4122, and ULIDs following the real spec — 48-bit millisecond timestamp plus 80-bit randomness, Crockford Base32 encoded to 26 characters, with monotonic ordering for IDs generated in the same millisecond. Paste any UUID or ULID back in to validate its format and, for ULIDs, decode the embedded creation timestamp into a real date.

• →UUID v4 via crypto.getRandomValues with correct version/variant bits
• →ULID with real 48-bit timestamp + 80-bit randomness, Crockford Base32
• →Monotonic ULID batch generator to demonstrate same-millisecond ordering
• →Decodes a pasted ULID's embedded timestamp into a human-readable date
• →Watermarked by Cikal Studio Labs · Works on any device, no install required